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(v) to perceive a man; to become aware or conscious of the presence of a man; to come to realize or understand the existence of a man.
1. *two lady-friends walking into a restaurant*
A:I'm really glad we have this time to bond, lady-style.
B:BUT WAIT! I've just manceived...12 o'clock!

2. Her mouth fell open in amazement as she manceived the wild majestic beauty in his natural habitat.
by disgruntledmustachio January 09, 2011