Pronunciation: (al'u-bī"), [key]
—n., pl. -bis,
1. Law.the defense by an accused person of having been elsewhere at the time an alleged offense was committed.
2. an excuse, esp. to avoid blame.
3. a person used as one's excuse: My sick grandmother was my alibi for missing school.
Informal.to give an excuse; offer a defense: to alibi for being late.
a. to provide an alibi for (someone): He alibied his friend out of a fix.
b. to make or find (one's way) by using alibis: to alibi one's way out of work.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.