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Definition of Hitchhiker
1. Noun. A person who travels by getting free rides from passing vehicles.
Definition of Hitchhiker
1. Noun. A person who hitchhikes. ¹
¹ Source: wiktionary.com
Definition of Hitchhiker
1. [n -S]
Medical Definition of Hitchhiker
1. A gene that has no selective advantage, or may even be harmful, but that nevertheless temporarily becomes widespread because it is closely linked and coupled with a highly advantageous gene that is strongly selected. (05 Mar 2000)