1. (verb)dampen, deaden, damp make vague or obscure or make (an image) less visible "muffle the message"
2. (verb)girdle, deaden cut a girdle around so as to kill by interrupting the circulation of water and nutrients "girdle the plant"
3. (verb)deaden make vapid or deprive of spirit "deadened wine"
4. (verb)deaden lessen the momentum or velocity of "deaden a ship's headway"
5. (verb)deaden become lifeless, less lively, intense, or active; lose life, force, or vigor
6. (verb)deaden, blunt make less lively, intense, or vigorous; impair in vigor, force, activity, or sensation "Terror blunted her feelings"; "deaden a sound"