n. Neglect or failure of execution; nonperformance. [ 1913 Webster ]
adj.
n.
a. Not having existence. [ 1913 Webster ]
adj. not exploratory. Opposite of
adj. Not explosive. [ Narrower terms:
n. A failure of exportation; a not exporting of commodities. [ 1913 Webster ]
adj. No longer existing; inaccessible through loss or destruction. [ WordNet 1.5 ]
Its nonextant original was written on vellum G. B. Saul
a. Not extensile; incapable of being stretched. [ 1913 Webster ]