Meaning of crash dive

crash' dive"

Pronunciation: [key]
  1. a rapid dive by a submarine made at a steep angle, esp. to avoid attack from a surface vessel or airplane.

crash-dive

Pronunciation: (krash'dīv', -dīv"), [key]
— -dived -dove, -dived, -div•ing.
  1. to dive rapidly at a steep angle.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.