A low-pitched, resonant sound, such as of an explosion. / A rapid expansion or increase. / (aviation) Ellipsis of sonic boom. / One of the calls of certain monkeys or birds.

Used to suggest the sound of an explosion. / Used to suggest something happening suddenly and unexpectedly. / The sound of a bass drum beating. / The sound of a cannon firing.

(nautical) A spar extending the foot of a sail; a spar rigged outboard from a ship's side to which boats are secured in harbour. / A movable pole used to support a microphone or camera.

To extend, or push, with a boom or pole. / (usually with "up" or "down") To raise or lower with a crane boom.

(economics, business) A period of prosperity, growth, progress, or high market activity.

(intransitive) To flourish, grow, or progress. / (transitive, dated) To cause to advance rapidly in price.

A Belgian town and municipality in the southwest of the Flemish province of Antwerp.

Experiencing a period of prosperity, or rapid economic growth. / Loud and resonant.

present participle of boom

A deep hollow or roaring sound.