1. (v. t.) To make quiet or calm; to pacify or appease; to quell; to calm; as, to allay one's fears; to allay the tumult of the passions.

2. (v. t.) To alleviate; to abate; to mitigate; as, to allay the severity of affliction or the bitterness of adversity.

3. (v. t.) To diminish in strength; to abate; to subside.

4. (n.) Alleviation; abatement; check.

5. (n.) Alloy.

6. (v. t.) To mix (metals); to mix with a baser metal; to alloy; to deteriorate.