Meaning of HINGE UPON

Pronunciation:			hinju'pân
WordNet Dictionary
	Definition:		[v]  be contingent on; "The outcomes rides on the results of the electin"; "Your grade will depends on your homework"
	Websites:
	Synonyms:		depend on, depend upon, devolve on, hinge on, ride, turn on
	See Also:		build on, build upon, repose on, rest on