[ boom ]
/ bum /


verb (used with object)

to extend or position, as a sail (usually followed by out or off).
to manipulate (an object) by or as by means of a crane or derrick.

verb (used without object)

to sail at full speed.

Nearby words

  1. boolean,
  2. boolean algebra,
  3. boolean operation,
  4. boolean ring,
  5. boolean sum,
  6. boom box,
  7. boom shot,
  8. boom town,
  9. boom, sonic,
  10. boom-and-bust


    lower the boom, to take decisive punitive action: The government has lowered the boom on tax evaders.

Origin of boom

1635–45; < Dutch: tree, pole, beam

Related formsboom·less, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for lower the boom


/ (buːm) /


to make a deep prolonged resonant sound, as of thunder or artillery fire
to prosper or cause to prosper vigorously and rapidlybusiness boomed


Word Origin for boom

C15: perhaps from Dutch bommen, of imitative origin


/ (buːm) /


nautical a spar to which a sail is fastened to control its position relative to the wind
a beam or spar pivoting at the foot of the mast of a derrick, controlling the distance from the mast at which a load is lifted or lowered
a pole, usually extensible, carrying an overhead microphone and projected over a film or television set
  1. a barrier across a waterway, usually consisting of a chain of connected floating logs, to confine free-floating logs, protect a harbour from attack, etc
  2. the area so barred off

Word Origin for boom

C16: from Dutch boom tree, beam

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for lower the boom
Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with lower the boom


see lower the boom.

The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.