Entry 2 senses · 2 variants Webster, 1913 Hal /(hâl)/ · IPA /hæl/ prop. n. prop. n. 01 prop. n. Harold; -- a nickname. 1. Harold; -- a nickname. 02 prop. n. The name of an intelligent computer in the movie 2001, directed by Stanley Kubrick. 1. The name of an intelligent computer in the movie 2001, directed by Stanley Kubrick.