from The American Heritage® Dictionary of the English Language, 4th Edition
- intransitive v. To undergo a crash dive.
from the GNU version of the Collaborative International Dictionary of English
- v. to descend steeply and rapidly; -- of aircraft.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a rapid descent by a submarine
- v. descend steeply and rapidly
Sorry, no etymologies found.