become destroyed by water, air, or an etching chemical such as an acid; "The metal corroded"; "The pipes rusted"
cause to deteriorate due to the action of water, air, or an acid; "The acid corroded the metal"; "The steady dripping of water rusted the metal stopper in the sink"
the act of allowing; "He objected to the allowance of smoking in the dining room"
a permissible difference; allowing some freedom to move within limits
an amount added or deducted on the basis of qualifying circumstances; "an allowance for profit"
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"