age

Definition

The amount of time that some being has been alive, or that some thing has been in existence, as measured from its birth or origin until the present or until some other given reference point. (Often measured in number of years; alternatively in months, days, hours, etc.; see also the usage notes)

Etymology

From Middle English age, Old French aage, eage, edage, from an assumed Vulgar Latin *aetāticum, derived from Latin aetātem, itself derived from aevum (“lifetime”), ultimately from Proto-Indo-European *h₂eyu- (“vital force”). Compare French âge. Displaced native Old English ieldu. The verb is from Middle English agen, from the noun. Originally found mostly as a participial adjective, probably an adjective in -ed, derived from the noun, reanalyzed to create a verb; perhaps modeled on such pairs as Latin senēscō (seneō; verb) / senex (adjective) and Middle French vieillir (verb) / vieil (adjective). Also compare Old French se aagier, eogier (“become of age”).

Example Sentences

• ""What is the age of your oldest child?" — "He's ten." (ten years old)"
• "What were their ages at the time of their marriage?"
• "We can determine the age of fossils using radiometric dating."