Year-old

adj, noun

adj, noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    Someone or something of the age of one year.

    "The year-olds are kept in the field all winter, in the same way as the calves, but get straw instead of hay, till near Christmas. They, of course, require more hay than the calves; but much hay is saved by their eating up the rough grass, left by the cows that pastured the ground in the summer, the calves and the year-olds being kept, during winter, in the old pasture-lands, never upon the poor, wet, thin clay."

Adjective
  1. 1
    Of the age of one year. not-comparable

    "He bought a year-old car."

Example

More examples

"A 19-year-old Canadian broke the world record last month for a nonstop, round-trip swim across the English Channel."

Etymology

The combining form -year-old dates from Middle English (ȝeer old(e), yeer old(e), yere old(e)).

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.