{
    "term": "boom",
    "partOfSpeech": "noun",
    "ox5000": true,
    "cefr": "c1",
    "image": "data/images/ve/vehicles_boats_ships_1.png",
    "definitions": [
        {
            "senseNumber": 1,
            "definition": "a sudden increase in trade and economic activity; a period of wealth and success",
            "sensetop": "boom in something",
            "cefr": "c1",
            "examples": [
                {
                    "text": "Living standards improved rapidly during the post-war boom."
                },
                {
                    "text": "a boom in car sales",
                    "contextForm": "boom in something"
                },
                {
                    "text": "a **boom year** (for trade, exports, etc.)"
                },
                {
                    "text": "a **property/housing boom**"
                },
                {
                    "text": "The boom was fuelled by accelerated demand for consumer products."
                },
                {
                    "text": "a boom in house prices"
                },
                {
                    "text": "a boom in real estate"
                },
                {
                    "text": "the ordinary business cycle of boom and bust"
                }
            ],
            "topics": ["Success", "Money"],
            "collocations": {
                "adjective": ["great", "post-war", "consumer"],
                "verb + boom": ["cause", "create", "fuel"],
                "boom + noun": ["period", "time", "year"],
                "preposition": ["during a/​the boom", "in a/​the boom", "boom in"],
                "phrases": ["boom and bust"]
            }
        },
        {
            "senseNumber": 2,
            "definition": "a period when something such as a sport or a type of music suddenly becomes very popular and successful",
            "cefr": "c1",
            "examples": [
                {
                    "text": "The only way to satisfy the golf boom was to build more courses."
                }
            ],
            "topics": ["Success"]
        },
        {
            "senseNumber": 3,
            "definition": "a long pole that the bottom of a sail is attached to and that you move to change the position of the sail",
            "cefr": "c2",
            "examples": [],
            "topics": ["Transport by water"]
        },
        {
            "senseNumber": 4,
            "definition": "a loud deep sound",
            "examples": [
                {
                    "text": "the distant boom of the guns"
                },
                {
                    "text": "The deep boom of a foghorn echoed across the bay."
                },
                {
                    "text": "The deafening boom of the explosion was heard up to 10 kilometres away."
                }
            ],
            "collocations": {
                "adjective": ["big", "loud", "deep"],
                "verb + boom": ["hear"],
                "boom + verb": ["echo"],
                "preposition": ["with a boom"]
            }
        },
        {
            "senseNumber": 5,
            "definition": "a floating barrier that is placed across a river or the entrance to a harbour to prevent ships or other objects from coming in or going out",
            "examples": []
        },
        {
            "senseNumber": 6,
            "definition": "a long pole that carries a microphone or other equipment",
            "examples": []
        },
        {
            "senseNumber": null,
            "definition": "a situation in which a period of rapid economic growth is followed by one of sudden decline",
            "examples": [
                {
                    "text": "High house prices encourage boom and bust and leave the economy vulnerable."
                },
                {
                    "text": "Amid the inevitable **boom and bust cycle**, families are facing pay cuts and job losses."
                }
            ],
            "topics": ["Money"]
        }
    ],
    "pronunciations": {
        "uk": [
            {
                "pronunciation": "/buːm/",
                "audio": "bo/boom/boom__gb_2.mp3"
            }
        ],
        "us": [
            {
                "pronunciation": "/buːm/",
                "audio": "bo/boom/boom__us_1.mp3"
            }
        ]
    },
    "wordOrigin": "noun sense 4 late Middle English (as a verb): ultimately imitative; perhaps from Dutch bommen ‘to hum, buzz’. noun senses 1 to 2 late 19th cent. (originally US): probably from boom ‘a loud sound’. noun sense 3 and noun senses 5 to 6 mid 16th cent. (in the general sense ‘beam, pole’): from Dutch, ‘beam, tree, pole’; related to beam."
}