n. & v.
—n. a deep resonant sound.
—v.intr. make or speak with a boom.
Etymology: imit.
2.
n. & v.
—n. a period of prosperity or sudden activity in commerce.
—v.intr. (esp. of commercial ventures) be suddenly prosperous or successful.
Phrases and idioms:
boom town a town undergoing sudden growth due to a boom.
Derivatives:
boomlet n.
Etymology: 19th-c. US word, perhaps f. BOOM(1) (cf. make things hum)
3.
n.
1 Naut. a pivoted spar to which the foot of a sail is attached, allowing the angle of the sail to be changed.
2 a long pole over a film or television set, carrying microphones and other equipment.
3 a floating barrier across the mouth of a harbour or river.
Etymology: Du., = BEAM n.
Useful english dictionary. 2012.