Definition of "hitchhiker"

A person or thing that hitchhikes.  examples

An item attached to a travel bug and hidden in a geocache to be found and transported to other caches or around the world.  examples

(preceded by definite article) A dance move in which the dancer mimics the motions of someone thumbing a ride.  examples

(informal, botany) A bur that attaches and clings to clothing, or a bur-bearing plant.  examples

(radio, advertising) An advertisement at the end of a programme.  quotations  examples