The Collaborative International Dictionary of English v.0.48:
hitchhike \hitch"hike`\ (h[i^]ch"h[imac]k`), v. i. To travel by getting free rides from passing vehicles; as, to hitchhike across the country. [WordNet 1.5]WordNet (r) 3.0 (2006):
hitchhike v 1: travel by getting free rides from motorists [syn: hitchhike, hitch, thumb]