To make as dead; to impair in vigor, force, activity, or sensation; to lessen the force or acuteness of; to blunt; as, to deaden the natural powers or feelings; to deaden a sound.
- To render less intense, sensitive, or vigorous: a medication to deaden the pain; wall tiles that deaden the sound from the rehearsal studio.
- To make soundproof.
- To make less colorful or brilliant.
- To become dead.
- To lose vigor, brilliance, or liveliness.