- To make quiet or put at rest; to pacify or appease; to
quell; to calm; as, to allay popular excitement; to allay the tumult of
the passions. - To alleviate; to abate; to mitigate; as, to allay the
severity of affliction or the bitterness of adversity. - To diminish in strength; to abate; to subside. - To mix (metals); to mix with a baser metal; to alloy; to
deteriorate.