Meaning

noun the cardinal number that is the sum of one and one and one

noun one of four playing cards in a deck having three pips

adjective being one more than two

originFrom Middle English thre, threo, thrie, thri, from Old English þrī, from Proto-West Germanic *þrīʀ, from Proto-Germanic *þrīz, from Proto-Indo-European *tréyes. Doublet of tres and trey. Cognate with German drei, Albanian tre, Armenian երեք (erekʻ), Latin trēs, Latvian trīs, Lithuanian trỹs, Greek τρεῖς (treís), Old Church Slavonic трьѥ (trĭje), and others.

Etymology from Wiktionary, CC BY-SA 3.0