Dictionary
non•plus
Pronunciation: (non-plus', non'plus), [key]
—v., -plussed or -plused, -plus•sing or -plus•ing,
—n.
—
v.t.
to render utterly perplexed; puzzle completely.
—
n.
a state of utter perplexity.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.