(ˈ)mäⁿ|kā, -äŋ|- adjective
Etymology: French, from past participle of manquer to lack, from Italian mancare — more at mancando
: failing to achieve a desired status through the force of circumstances or some inner flaw : short of or frustrated in the fulfillment of one's aspirations : unsuccessful — used postpositively
an artist manqué , now condemned to the operation of a candy store — Wolcott Gibbs
already he was spoken of as the great man manqué — J.C.Smith
the best writing in his book hints to me of a poet manqué — Saturday Review