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number one

 - 3 dictionary results

number one

–noun
1. oneself, esp. one's own well-being or interests: to look out for number one.
2. a person, company, etc., that is first in rank, order, or prestige: Our team is number one.
3. of the highest in quality, status, importance, etc.; first-rate: a number one performance.
4. first in rank, order, or prestige: the number one book on the bestseller list.
5. urination: used esp. by or with reference to children.
6. make, do, or go number one, Informal. to urinate: used esp. by or with reference to children.

Origin:
1830–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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number one  
n.  
  1. One that is first in rank, order, or importance.

  2. Slang One's own interests; oneself: watching out for number one.

  3. Informal

    1. The act of urinating.

    2. Urine.

adj.  
  1. First in rank, order, or importance: the number one team in the nation; our number one problem.

  2. Foremost in quality; first-rate: bought some number one farmland.

The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Slang Dictionary
number one

  1. mod.
    top rate; best. (See also numero uno.) : We heard the number one high school band in the whole state last night.
  2. n.
    oneself. : I don't know who will pay for the broken window, but old number one isn't!
  3. n.
    urination; an act of urination. : Jimmy made a mess in his pants. But don't worry. It's just number one.
Dictionary of American Slang and Colloquial Expressions by Richard A. Spears.Fourth Edition.
Copyright 2007. Published by McGraw Hill.
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