RhymeZone: prerelease definitions

Definitions of prerelease:

adjective: Before release.
noun: A preliminary version of a work, released in advance.
noun: (skiing) An inadvertent (premature) release of a skiboot from the bindings of a ski, caused by excessive vibration, such as going over an extremely bumpy piste.
verb: To release in advance

(Definitions from Wiktionary)