boom (n.)

  1. a deep prolonged loud noise

    [ Syn: roar , roaring , thunder ]

  2. a state of economic prosperity

  3. a sudden happening that brings good fortune (as a sudden opportunity to make money); the demand for testing has created a boom for those unregulated laboratories where boxes of specimen jars are processed like an assembly line

    [ Syn: bonanza , gold rush , gravy , godsend , manna from heaven , windfall , bunce ]

  4. a pole carrying an overhead microphone projected over a film or tv set

    [ Syn: microphone boom ]

  5. any of various more-or-less horizontal spars or poles used to extend the foot of a sail or for handling cargo or in mooring

    boom (v.)

  1. make a resonant sound, like artillery; His deep voice boomed through the hall

    [ Syn: din ]

  2. hit hard; He smashed a 3-run homer

    [ Syn: smash , nail , blast ]

  3. be the case that thunder is being heard; Whenever it thunders, my dog crawls under the bed

    [ Syn: thunder ]

  4. make a deep hollow sound; Her voice booms out the words of the song

    [ Syn: boom out ]

  5. grow vigorously; The deer population in this town is thriving; business is booming

    [ Syn: thrive , flourish , expand ]

The dictionary is based on the WordNet Electronic Lexical Database.
WordNet 3.0 Copyright 2011 by Princeton University. All rights reserved.