To bring forth a calf or calves: sometimes used contemptuously of human beings, and by Milton of the earth at the creation of cattle, etc.To become separated from or lose a portion of itself: said of a glacier when icebergs are broken off from it.To become detached and fall inward, as earth or rock from the walls of a cutting: with in. Now cave in.To give birth to, as a cow to a calf; bring forth.