fail

(fāl)

1. To prove deficient or lacking; perform ineffectively or inadequately: failed to fulfill their promises; failed in their attempt to reach the summit.
2. To be unsuccessful: an experiment that failed.
3. To receive an academic grade below the acceptable minimum.
4. To prove insufficient in quantity or duration; give out: The water supply failed during the drought.
5. To decline, as in strength or effectiveness: The light began to fail.
6. To cease functioning properly: The engine failed.
7. To give way or be made otherwise useless as a result of excessive strain: The rusted girders failed and caused the bridge to collapse.
8. To become bankrupt or insolvent: Their business failed during the last recession.

1. To disappoint or prove undependable to: Our sentries failed us.
2. To abandon; forsake: His strength failed him.
3. To omit to perform (an expected duty, for example): “We must . . . hold . . . those horrors up to the light of justice. Otherwise we would fail our inescapable obligation to the victims of Nazism: to remember” (Anthony Lewis).
4. To leave undone; neglect: failed to wash the dishes.
5. a. To receive an academic grade below the acceptable minimum in (a course, for example): failed algebra twice.
   b. To give such a grade of failure to (a student): failed me in algebra.

1. Failure to deliver securities to a purchaser within a specified time.
2. Failure to receive the proceeds of a transaction, as in the sale of stock or securities, by a specified date.