overage

over +‎ age

• IPA^(key): /ˈəʊvəɹˈeɪdʒ/

overage (comparative more overage, superlative most overage)

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

• underage

overage (third-person singular simple present overages, present participle overaging, simple past and past participle overaged)

1. To have too long an aging process.
   • 1997, George Murray, Handbook of Materials Selection for Engineering Applications, →ISBN, page 92:

     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.

   • 2013, Mahmoud M. Farag, Materials and Process Selection for Engineering Design, →ISBN:

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

over +‎ -age

• IPA^(key): /ˈəʊvəɹɪdʒ/

overage (countable and uncountable, plural overages)

1. A surplus of inventory or capacity or of cash that is greater than the amount in the record of an account.
2. A state of being more than one ought to be.

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