Word.ws English Dictionary

one-year-old

one-year-old adjective: having lived or existed for one year.

Adjective

one-year-old (not comparable)

  1. Having lived or existed for one year.
    • a one-year-old car
    Synonyms:
    year-old

Noun

one-year-old (plural one-year-olds)

  1. A child or animal that is one year of age.
    Synonyms:
    yearling

Synonyms of one-year-old

Forms of one-year-old

pluralone-year-olds

Origin of one-year-old

From one + year + old.

Questions about one-year-old

What does one-year-old mean?
One-year-old means having lived or existed for one year.
What part of speech is one-year-old?
One-year-old can be an adjective or a noun.

Words near one-year-old in the dictionary

  1. one-worlder
  2. one-worlders
  3. one-worldism
  4. one-worldist
  5. one-worldists
  6. one-year-old
  7. one-year-olds
  8. Oneal
  9. Oneatta
  10. onebag
  11. oneberry

Source and license

Adapted from Wiktionary: one-year-old (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Cite this entry: “one-year-old.” Word.ws, https://word.ws/one-year-old. Based on Wiktionary, CC BY-SA 4.0.