{
    "term": "reaction",
    "partOfSpeech": "noun",
    "academic": true,
    "ox3000": true,
    "cefr": "b1",
    "definitions": [
        {
            "senseNumber": 1,
            "definition": "what you do, say or think as a result of something that has happened",
            "sensetop": "reaction to somethingin reaction to somethingreaction of somebodyreaction from somebody",
            "cefr": "b1",
            "ox3000": true,
            "examples": [
                {
                    "text": "to **provoke/cause/get a reaction**"
                },
                {
                    "text": "a **positive/negative/adverse reaction**"
                },
                {
                    "text": "What was his reaction to the news?",
                    "contextForm": "reaction to something"
                },
                {
                    "text": "Often our actions are based upon an **emotional reaction** to what someone has done or said to us."
                },
                {
                    "text": "A spokesman said the changes were not in reaction to the company's recent losses.",
                    "contextForm": "in reaction to something"
                },
                {
                    "text": "The **initial reaction** of the White House was favourable.",
                    "contextForm": "reaction of somebody"
                },
                {
                    "text": "It's just another **knee-jerk reaction** from sections of the media.",
                    "contextForm": "reaction from somebody"
                },
                {
                    "text": "My **immediate reaction** was one of shock."
                },
                {
                    "text": "There has been a **mixed reaction** to her appointment as director."
                },
                {
                    "text": "The decision provoked an angry reaction from local residents."
                },
                {
                    "text": "I tried shaking him but there was no reaction."
                },
                {
                    "text": "He eyed her cautiously, trying to gauge her reaction."
                },
                {
                    "text": "Her outburst was a delayed reaction to an unpleasant letter she'd received that morning."
                },
                {
                    "text": "His reaction is completely understandable."
                },
                {
                    "text": "Judging by her reaction, she liked the present."
                },
                {
                    "text": "I was surprised at the reaction brought by the mention of his name."
                },
                {
                    "text": "The critical reaction to his first novel has been positive."
                },
                {
                    "text": "The incident calls for a measured response, avoiding knee-jerk reactions."
                },
                {
                    "text": "The play met with a mixed reaction from the critics."
                },
                {
                    "text": "The speech got a mixed reaction."
                },
                {
                    "text": "There's been a drop in ticket sales in reaction to the review."
                },
                {
                    "text": "the public reaction to the news"
                }
            ],
            "topics": ["Change, cause and effect"],
            "collocations": {
                "adjective": ["extreme", "strong", "violent"],
                "verb + reaction": ["get", "have", "meet with"],
                "preposition": ["in reaction to", "reaction against", "reaction to"]
            }
        },
        {
            "senseNumber": 2,
            "definition": "a change in people’s attitudes or behaviour caused by disapproval of the attitudes, etc. of the past",
            "sensetop": "reaction against something",
            "cefr": "b2",
            "ox3000": true,
            "examples": [
                {
                    "text": "Some analysts explain the rise of nationalism as a reaction against globalization."
                },
                {
                    "text": "Her rebellious attitude is just a reaction against her strict upbringing."
                }
            ],
            "collocations": {
                "adjective": ["extreme", "strong", "violent"],
                "verb + reaction": ["get", "have", "meet with"],
                "preposition": ["in reaction to", "reaction against", "reaction to"]
            }
        },
        {
            "senseNumber": 3,
            "definition": "a response by the body, usually a bad one, to a drug, chemical substance, etc.",
            "sensetop": "reaction to something",
            "cefr": "b1",
            "ox3000": true,
            "examples": [
                {
                    "text": "If you **have** a bad **reaction**, discontinue use immediately."
                },
                {
                    "text": "to have an **allergic reaction** to a drug",
                    "contextForm": "reaction to something"
                },
                {
                    "text": "**Adverse reactions** to certain foods can take a few days to manifest."
                },
                {
                    "text": "a delayed reaction to the drugs"
                },
                {
                    "text": "She had a very bad allergic reaction to the peanuts."
                },
                {
                    "text": "I believe he is experiencing a post-traumatic stress reaction."
                }
            ],
            "topics": ["Health problems"],
            "collocations": {
                "adjective": ["adverse", "bad", "severe"],
                "verb + reaction": ["experience", "have", "suffer"],
                "preposition": ["reaction to"]
            }
        },
        {
            "senseNumber": 4,
            "definition": "the ability to move quickly in response to something, especially if in danger",
            "examples": [
                {
                    "text": "a skilled driver with quick reactions"
                },
                {
                    "text": "Tiredness has the effect of slowing down your reactions."
                },
                {
                    "text": "Keenan showed lightning reactions."
                },
                {
                    "text": "She has very quick reactions."
                }
            ],
            "collocations": {
                "adjective": ["fast", "good", "lightning"],
                "verb + reaction": ["have", "speed up", "slow down"],
                "reaction + noun": ["time"]
            }
        },
        {
            "senseNumber": 5,
            "definition": "a chemical change produced by two or more substances acting on each other",
            "sensetop": "reaction of something with somethingreaction of A and B",
            "labels": "(chemistry)",
            "cefr": "b1",
            "ox3000": true,
            "examples": [
                {
                    "text": "a **chemical reaction**"
                },
                {
                    "text": "a nuclear reaction"
                },
                {
                    "text": "To perform the test, add five drops of the solution to the compound and then observe the reaction."
                },
                {
                    "text": "the reaction of oxygen with other atoms",
                    "contextForm": "reaction of something with something"
                },
                {
                    "text": "the reaction of chlorine atoms and ozone",
                    "contextForm": "reaction of A and B"
                },
                {
                    "text": "the energy given out during the reaction"
                },
                {
                    "text": "the fuel's chemical reaction with the surrounding water"
                },
                {
                    "text": "I am studying the reactions between certain gases."
                }
            ],
            "topics": ["Physics and chemistry"],
            "collocations": {
                "adjective": ["chain", "chemical", "nuclear"],
                "verb + reaction": ["cause", "initiate", "produce"],
                "reaction + verb": ["occur", "take place"],
                "preposition": [
                    "during a/​the reaction",
                    "in a/​the reaction",
                    "reaction between"
                ]
            }
        },
        {
            "senseNumber": 6,
            "definition": "a force shown by something in response to another force, which is of equal strength and acts in the opposite direction",
            "labels": "(physics)",
            "examples": [
                {
                    "text": "Action and reaction are equal and opposite."
                }
            ]
        },
        {
            "senseNumber": 7,
            "definition": "opposition to social or political progress or change",
            "examples": [
                {
                    "text": "The forces of reaction made change difficult."
                }
            ]
        }
    ],
    "pronunciations": {
        "uk": [
            {
                "pronunciation": "/riˈækʃn/",
                "audio": "re/reaction/reaction__gb_3.mp3"
            }
        ],
        "us": [
            {
                "pronunciation": "/riˈækʃn/",
                "audio": "re/reaction/reaction__us_2.mp3"
            }
        ]
    },
    "wordOrigin": "mid 17th cent.: from react + -ion, originally suggested by medieval Latin reactio(n-), from react- ‘done again’, from the verb reagere."
}