(figurative) a course of action that is unproductive and offers no hope of improvement; "all the clues led the police into blind alleys"; "so far every road that we've been down has turned out to be a blind alley"
the trait of appreciating (and being able to express) the humorous; "she didn't appreciate my humor"; "you can't survive in the army without a sense of humor"
the quality of being funny; "I fail to see the humor in it"
(Middle Ages) one of the four fluids in the body whose balance was believed to determine your emotional and physical state; "the humors are blood and phlegm and yellow and black bile"