{
    "term": "gas",
    "partOfSpeech": "noun",
    "ox3000": true,
    "cefr": "a2",
    "definitions": [
        {
            "senseNumber": 1,
            "definition": "any substance like air that is neither a solid nor a liquid, for example hydrogen or oxygen",
            "cefr": "a2",
            "ox3000": true,
            "examples": [
                {
                    "text": "Air is a mixture of gases."
                },
                {
                    "text": "Carbon monoxide is a poisonous gas."
                },
                {
                    "text": "It gives off a poisonous gas as it decomposes."
                },
                {
                    "text": "Noxious gases had built up in the sewer."
                },
                {
                    "text": "Toxic gases can escape through one of the pipes."
                },
                {
                    "text": "Producing methane gas from organic waste is another extremely practical use of resources."
                },
                {
                    "text": "CFC gases"
                }
            ],
            "topics": ["Physics and chemistry"],
            "collocations": {
                "adjective": ["deadly", "noxious", "poisonous"],
                "verb + gas": ["emit", "give off", "produce"],
                "gas + verb": ["build up"],
                "gas + noun": ["leak", "emissions", "chamber"]
            }
        },
        {
            "senseNumber": 2,
            "definition": "a particular type of gas or mixture of gases used as fuel for heating and cooking",
            "labels": "(British English)",
            "cefr": "a2",
            "ox3000": true,
            "examples": [
                {
                    "text": "fossil fuels like oil and gas"
                },
                {
                    "text": "Can you smell gas?"
                },
                {
                    "text": "a gas cooker/stove/fire"
                },
                {
                    "text": "gas central heating"
                },
                {
                    "text": "a gas leak/explosion"
                },
                {
                    "text": "plans to build a new **gas pipeline**"
                },
                {
                    "text": "**Gas prices** have risen sharply."
                },
                {
                    "text": "The country has huge gas reserves."
                },
                {
                    "text": "a gas canister/cylinder *(= for storing gas)*"
                },
                {
                    "text": "Preheat the oven to gas mark 5 *(= a particular temperature of a gas oven)*."
                },
                {
                    "text": "Chinese gas reserves are now being tapped."
                },
                {
                    "text": "I lit the gas and put the soup on to warm."
                },
                {
                    "text": "I prefer to cook with gas."
                },
                {
                    "text": "Local gas works were closed as natural gas became available."
                },
                {
                    "text": "tapping the North Sea gas fields"
                },
                {
                    "text": "The explosion was caused by a gas leak."
                }
            ],
            "topics": ["The environment"],
            "collocations": {
                "adjective": ["butane", "coal", "natural"],
                "verb + gas": ["cook with", "light", "turn on"],
                "gas + noun": ["appliance", "boiler", "central heating"],
                "phrases": ["gas mark 2, 3, etc."]
            }
        },
        {
            "senseNumber": 3,
            "definition": "a particular type of gas used during a medical operation, to make the patient unconscious or to make the pain less",
            "examples": [
                {
                    "text": "an anaesthetic gas"
                },
                {
                    "text": "Did you have gas or an injection?"
                },
                {
                    "text": "During the birth she was given gas and air."
                }
            ]
        },
        {
            "senseNumber": 4,
            "definition": "a particular type of gas used in war to kill or injure people, or used by the police to control people",
            "examples": [
                {
                    "text": "a gas attack"
                }
            ]
        },
        {
            "senseNumber": 5,
            "definition": "a liquid obtained from petroleum, used as fuel in car engines, etc.",
            "labels": "(both North American English)British English",
            "cefr": "a2",
            "ox3000": true,
            "examples": [
                {
                    "text": "to run out of gas"
                },
                {
                    "text": "I still had plenty of gas in the tank."
                },
                {
                    "text": "He supported himself with a night job pumping gas."
                },
                {
                    "text": "a gas pump"
                }
            ],
            "topics": ["The environment", "Transport by car or lorry"],
            "collocations": {
                "gas + noun": ["pedal", "station"]
            }
        },
        {
            "senseNumber": 6,
            "definition": "the pedal in a car or other vehicle that you press with your foot to control the speed of the engine",
            "labels": "(both especially North American English)British and North American English",
            "examples": [
                {
                    "text": "**Step on the gas**, we're late."
                }
            ]
        },
        {
            "senseNumber": 7,
            "definition": "a person or an event that is fun",
            "labels": "(especially North American English)",
            "examples": [
                {
                    "text": "The party was a real gas."
                }
            ]
        },
        {
            "senseNumber": 8,
            "definition": "air that you swallow with food or drink; gas that is produced in your stomach or intestines that makes you feel uncomfortable",
            "labels": "(North American English)British English",
            "examples": []
        },
        {
            "senseNumber": null,
            "definition": "to be doing something very well and successfully",
            "labels": "(informal)",
            "examples": [],
            "topics": ["Success"]
        }
    ],
    "pronunciations": {
        "uk": [
            {
                "pronunciation": "/ɡæs/",
                "audio": "ga/gas/gas__gb_2.mp3"
            }
        ],
        "us": [
            {
                "pronunciation": "/ɡæs/",
                "audio": "ga/gas/gas__us_1.mp3"
            }
        ]
    },
    "wordOrigin": "mid 17th cent.: invented by J. B. van Helmont (1577–1644), Belgian chemist, to denote an occult principle which he believed to exist in all matter; suggested by Greek khaos ‘chaos’, with Dutch g representing Greek kh."
}