- Law.
- A form of defense whereby a defendant attempts to prove that he or she was elsewhere when the crime in question was committed.
- The fact of having been elsewhere when a crime in question was committed.
- Usage Problem. An explanation offered to avoid blame or justify action; an excuse.
v. Usage Problem., -bied, -bi·ing, -bis. v.intr.
To make an excuse for oneself.
v.tr.To make an excuse for (another).
[Latin, elsewhere, from alius, other (on the model of ibi, there).]
USAGE NOTE When used as a noun, alibi in its nonlegal sense of “an excuse” is acceptable in written usage to almost half of the Usage Panel. As a verb (they never alibi), it is unacceptable in written usage to a large majority of the Panel.






