allowance -- (an amount allowed or granted (as during a given period); "travel allowance"; "my weekly allowance of two eggs"; "a child's allowance should not be too generous")
allowance -- (a sum granted as reimbursement for expenses)
allowance, adjustment -- (an amount added or deducted on the basis of qualifying circumstances; "an allowance for profit")
allowance, leeway, margin, tolerance -- (a permissible difference; allowing some freedom to move within limits)