Definitions
1.nounAlleviation; abatement; check.
2.nounAn alloy.
3.verbTo make quiet or put at rest; to pacify or appease; to quell; to calm."to allay popular excitement"
4.verbTo alleviate; to abate; to mitigate."to allay the severity of affliction or the bitterness of adversity"
5.verbTo subside, abate, become peaceful.
6.verbTo mix (metals); to mix with a baser metal; to alloy; to deteriorate.
7.verb(by extension) To make worse by the introduction of inferior elements.