(transitive) To make damp or moist; to make moderately wet.

(intransitive) To become damp or moist.

(transitive) To lessen; to dull; to make less intense (said of emotions and non-physical things).

(transitive, proscribed) To suppress vibrations (mechanical) or oscillations (electrical) by converting energy to heat (or some other form of energy).

(intransitive) To become damped or deadened.