number one

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number one (not comparable)

  1. (idiomatic) First; foremost; best, often used after its headword.
    Commuting to work is the number one reason to own a car.
    He is my enemy number one.



number one (plural number ones)

  1. the most important person, the one who is in charge
  2. someone who is top of a ranking, who is ranked first.
    • 2011 July 3, Piers Newbury, “Wimbledon 2011: Novak Djokovic beats Rafael Nadal in final”, in BBC Sport[1]:
      Djokovic came through 6-4 6-1 1-6 6-3 to end Nadal's reign as Wimbledon champion, before overtaking the Spaniard as world number one on Monday.
  3. oneself, being considered foremost, as by an egoist
    • Charles Dickens, The Pickwick Papers
      No man should have more than two attachments—the first, to number one, and the second to the ladies; that's what I say—ha! ha!
  4. (childish, euphemistic) Urine; urination.
  5. (music) the single that has sold the most in a given period.
  6. (soccer) The main goalkeeper of a team, so-called because they wear the number 1 on the back of their kit.
    • 2011 January 5, Jonathan Stevenson, “Arsenal 0 - 0 Man City”, in BBC[2]:
      England number one Hart produced a magnificent moment to deny Van Persie once more just after the hour mark, leaping across his goal to fingertip the Dutchman's crashing 25-yard, top corner-bound drive away.
  7. (cricket) The batsman who opens the batting.
  8. Used other than with a figurative or idiomatic meaning: see number,‎ one.

Derived terms[edit]


The translations below need to be checked and inserted above into the appropriate translation tables, removing any numbers. Numbers do not necessarily match those in definitions. See instructions at Wiktionary:Entry layout#Translations.

See also[edit]