- (countable) listless indolence; dreaminess
"a certain languor in the air hinted at an early summer -- James Purdy"
- (uncountable) a state of the body or mind caused by exhaustion or disease and characterized by a languid feeling: lassitude
"languor of convalescence"
- (obsolete, countable) An enfeebling disease; suffering
- (uncountable) dullness, sluggishness; lack of vigor; stagnation
"from languor she passed to the lightest vivacity -- Elinor Wylie"