a sample; a rehearsalDepending on context, Probe can mean a sample taken for testing, a rehearsal, or a test. In „eine Probe nehmen“ it usually means “take a sample,” while „eine Probe machen“ often means “have a rehearsal.”
GE: Wir machen heute Abend eine Probe für das Theaterstück.
EN: We’re having a rehearsal for the play tonight.