day one

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English[edit]

Noun[edit]

day one

  1. Used other than with a figurative or idiomatic meaning: see day,‎ one.
  2. The very beginning
    I've been with the project since day one.

Adverb[edit]

day one

  1. When it has just entered the market.
    to buy something day one

See also[edit]

Anagrams[edit]