Meaning

adjective being or characteristic of a single thing or person

noun a base hit on which the batter stops safely at first base

verb hit a single

originFrom Middle English single, sengle, from Old French sengle, saingle, sangle, from Latin singulus, a diminutive derived from Proto-Indo-European *sem- (“one”). Akin to Latin simplex (“simple”). See simple, and compare singular.

Etymology from Wiktionary, CC BY-SA 3.0