1. To deprive of a portion of vigor, force or sensation; to abate vigor or action; as, to deaden the force of a ball; to deaden the natural powers or feelings.

2. To blunt; to render less susceptible or feeling; as, to deaden the motion of a ship or of the wind.

3. To retard; to lessen velocity or motion; as, to deaden the motion of a ship or of the wind.

4. To diminish spirit; to make vapid or spiritless; as, to deaden wine or beer.

, a. Having a dull, faint heart.