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View synonyms for number one

number one

noun

  1. oneself, especially 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. urination: used especially by or with reference to children.


adjective

  1. of the highest in quality, status, importance, etc.; first-rate:

    a number one performance.

  2. first in rank, order, or prestige:

    the number one book on the bestseller list.

number one

noun

  1. the first in a series or sequence
  2. an informal phrase for oneself myself

    to look after number one

  3. informal.
    the most important person; leader, chief

    he's number one in the organization

  4. informal.
    the bestselling pop record in any one week
  5. euphemistic.
    the act or an instance of urination
  6. a haircut in which the hair is cut very close to the head with an electric shaver
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


adjective

  1. first in importance, urgency, quality, etc

    number one priority

  2. informal.
    (of a pop record) having reached the top of the charts
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of number one1

First recorded in 1830–40
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Idioms and Phrases

Idioms
  1. make / do / go number one, Informal. to urinate: used especially by or with reference to children.
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Example Sentences

The musical promise of eternal youth sold to the tune of 5.5 million copies and five number-one singles.

But after logging her eighth number-one single, Katy Perry might be the biggest pop star of her time.

My husband in my number-one priority and I his; why would we want to change this so we can be slaves to a child?

But the number-one thing rats want to be around is people, people who drop garbage on the ground.

The voting portion of the contest ended yesterday, and I swept the number-one spot.

What does a first-class A-number-one lawyer like Root care about facts if they ain't in his favor?

Roger hurried along with Astro to the number-one boat and climbed inside.

And she said these was A-Number-One beagles, being sure to get a rabbit if one was in the country.

You've got thirty tons of fuel—you want to find the compression ratio of the number-one firing-tube chamber—so what do you do?

Among them was his number-one boy, Kwong, who had served him faithfully for several years.

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Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

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