n. An ornamented pin used to secure a necktie's end flat against the shirt, a tie tack.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a decorative pin that is worn in a necktie
Word Usage
"He was attired in perfectly-tailored evening-dress, and the cut of the suit suggested that the large diamond stickpin in his cravat was the genuine article and not paste."