the act of allowing, permitting, admitting, etc.: the allowance of a claim
something allowed as a share; specif., an amount of money, food, etc. given regularly to a child, dependent, etc. or to military personnel for a specific purpose: travel allowance
a reduction in the price of something in consideration of a large order or of turning in a used article, etc.
the amount by which something is allowed to be more or less than stated, as to compensate for the weight of the container, inaccuracy of machining, etc.