from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Lacking a sense of humor.
- adj. Said or done without humor: "She winked at me, but it was humorless; a wink of warning” ( Truman Capote).
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Lacking humor or levity; serious; not funny, amusing, amused, or lighthearted.
from the GNU version of the Collaborative International Dictionary of English
- adj. Destitute of humor.
from The Century Dictionary and Cyclopedia
- Without humor; sober; dull.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. lacking humor
From humor + -less. (Wiktionary)