Boom (bo͞om), v. i. [imp. & p. p.Boomed (bo͞omd), p. pr. & vb. n.Booming.] [Of imitative origin; cf. OE. bommen to hum, D. bommen to drum, sound as an empty barrel, also W. bwmp a hollow sound; aderyn y bwmp, the bird of the hollow sound, i.e., the bittern. Cf. Bum, Bump, v. i., Bomb, v. i.] 1. To cry with a hollow note; to make a hollow sound, as the bittern, and some insects.
At eve the beetle boometh
Athwart the thicket lone.
Tennyson.
2. To make a hollow sound, as of waves or cannon.
Alarm guns booming through the night air.
W. Irving.
3. To rush with violence and noise, as a ship under a press of sail, before a free wind.
She comes booming down before it.
Totten.
4. To have a rapid growth in market value or in popular favor; to go on rushingly.