run time
1. The elapsed time to perform a computation on a particular
computer.
2. The amount of time a processor actually spent on a
particular process and not on other processes or overhead (see
{time-sharing}).
3. The period of time during which a program is being
executed, as opposed to {compile-time} or load time. The term
should be hyphenated when used as an adjective.
4. {run-time support}.
(2001-09-14)