What is the meaning of Dampen?

To make damp or moist; to make moderately wet.

To become damp or moist.

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

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

To become damped or deadened.

Due to confusion with the similar-looking verb damp, overgeneralization from the nearby sense of "to lessen or to dull", and/or conflation of transitive "damp" with intransitive "dampen", "dampen" is increasingly used in nontechnical contexts as a synonym for "damp", especially in the case of "dampened" versus "damped". However, this usage is still considered incorrect in technical contexts.

definite singular of damp

to steam, to give off steam or smoke

to vape (to inhale the vapour of an electronic cigarette)

plural of damp

Alternative form of dampnen

definite singular of damp

definite singular of damp

Source: wiktionary.org