overage

adj

1. Having an age that is greater than a stipulated minimum.
2. Too old to be of use in a particular situation.

verb

1. To have too long an aging process.

   “The heat-treatable alloys may overage (soften) with time at temperature due to the coalescence of the precipitate particles which, when present in a smaller dispersed size, enhance roomtemperature strength.”

   “Structures that have been precipitation hardened to peak values may overage, and steels that have been hardened and tempered may overtemper.”

noun

1. (countable, uncountable)A surplus of inventory or capacity or of cash that is greater than the amount in the record of an account.
2. (countable, uncountable)Excess; a state of being more than it ought to be.

   “You're entitled to bring a bag weighing fifty pounds onto the airplane, and will be charged extra for any overage.”

   “Receiving department, 3 A.M. / Staff cuts have socked up the overage. / Directives are posted, no callbacks, complaints. / Everywhere is calm.”

   “The overage charge on this plan has been reduced to 10 cents per megabyte over the limit. Previously, the company charged 25 cents per megabyte for overages.”

3. (countable, uncountable)Any additional sums payable following the purchase of land, calculated on a prearranged basis, on the occurrence of certain specified events that are deemed to increase the value of that land; usually in the context of the development and further sale of that land.