An initial trial of a device or system to test its basic function.

(idiomatic) To be the leader, to be in charge

present participle of run counter

plural of run-time

A leisure activity where someone is attached to a secured bungee cord and must run as far away as possible.

Amelanchier spicata.

(African-American Vernacular, transitive) To cheat someone; to play someone for a fool

plural of running stitch

(idiomatic) Ordinary persons, things, or events.

present participle of re-run