Pronunciation: (tāl'spin"), [key]
—n., v., -spinned, -spin•ning.
—n. Also,tail' spin".
1. spin (def. 24).
2. a sudden and helpless collapse into failure, confusion, or the like.
to take or experience a sudden and dramatic downturn: After the mill closes, the local economy may tailspin.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.