• synonyms

day one

See more synonyms for day one on Thesaurus.com
  1. (often initial capital letters) the very first day or beginning of something.
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Origin of day one

First recorded in 1975–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Examples from the Web for day one

Historical Examples

  • It was a sunny, summer day-one of those days which incline the heart to prayer, and bring tears of happiness to the eyes.

    Frederick The Great and His Family

    L. Muhlbach