the GNU version of the Collaborative International Dictionary of English
adj. Forced; unnatural; insincere; hence, derisive, mocking, malignant, or bitterly sarcastic; -- applied only to a laugh, smile, or some facial semblance of gayety.
adj. Of, pertaining to, or resembling, a kind of linen made at Colchis.
The Century Dictionary and Cyclopedia
Apparently but not really proceeding from gaiety; forced: said of a laugh or smile.
Bitterly ironical; sarcastic; derisive and malignant; sneering: now the usual meaning.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. disdainfully or ironically humorous; scornful and mocking
Word Usage
"Leaning up against her wall, his arms and ankles crossed, his expression sardonic."