number one

1 of 2

noun

plural number ones
1
a
: one's own interests or welfare : oneself
It's time to take care of number one
often written No. 1
Looking out for No. 1 is not a selfish thing when it comes to rescuing someone, area firefighters learned.Cathy Spaulding
b
: one that is first in rank, importance, or influence
Who's number one in this office?
Madonna has just made a big announcement. The "Material Girl" … will release not one, but two new collections. One will feature 50 number ones with the other being a 16-track version of the album.Edward Pevos
often written No. 1
The Texas Tech men's golf team, which has finished among the top three in each of its three tournaments this season, is No. 1 in the GolfStat ranking that was released Wednesday.Lubbock (Texas) Avalanche-Journal (online)
2
informal : liquid waste from the body : urine
used euphemistically
When astronauts go number one, a slight vacuum in the toilet pulls urine into a low-pressure chamber, which forces the water to evaporate.Kaitlin Sullivan
compare number two

number one

2 of 2

adjective

1
: first in rank, importance, or influence : foremost
cancer is the country's number one killer
often written No. 1
2
: of highest or of high quality

Examples of number one in a Sentence

Noun Who's number one in this office? Getting the car fixed is number one on my list of priorities. I'll tell you why we can't go on a vacation: number one, we can't afford it, and number two, we'll miss my sister's party. Her movie is currently number one at the box office. When the goal was scored, the fans started to chant, “We're number one, we're number one.” I've been taking care of other people for too long. It's time for me to take care of number one. Adjective The book is the company's number one seller. Rule number one is don't get caught! He's public enemy number one: the nation's most wanted criminal.
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Noun
Stuffing has taken over the number one spot from mashed potatoes this year, with 61% of Americans pulling out a family recipe for the top dish. Sharon Greenthal, Better Homes & Gardens, 2 Nov. 2024 The two companies have been ranked as the world’s top plastic polluters for five consecutive years, and Coca-Cola has taken the number one spot for six years, according to global environmental group Break Free From Plastic. Orianna Rosa Royle, Fortune, 1 Nov. 2024
Adjective
Our number one priority is just to get the behavior of these companies to change. Donna St. George, BostonGlobe.com, 19 Mar. 2023 Talked about number one in the country a year ago and some of our championships. Tom Green | [email protected], al, 15 Mar. 2023 See all Example Sentences for number one 

Word History

First Known Use

Noun

1705, in the meaning defined at sense 1a

Adjective

1839, in the meaning defined at sense 1

Time Traveler
The first known use of number one was in 1705

Dictionary Entries Near number one

Cite this Entry

“Number one.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/number%20one. Accessed 28 Nov. 2024.

Last Updated: - Updated example sentences
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