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Number one

adj, name, noun, slang

Adjective

1
First; foremost; best, often used after its headword. idiomatic, not-comparable
"Commuting to work is the number one reason to own a car."
2
Black, African-American. US, not-comparable, slang

Proper Noun

Noun

1
The most important person, the one who is in charge.
2
a reference to yourself or myself etc.; ‘take care of number one’ means to put your own interests first wordnet
3
Someone who is top of a ranking, who is ranked first.
"The phone rings, in the middle of the night / My father yells "what you gonna do with your life" / Oh, daddy, dear, you know you're still number one / But girls, they wanna have fun / Oh, girls just wanna have..."
4
the first element in a countable series wordnet
5
Oneself, being considered foremost, as by an egoist.
"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!"

Show 8 more definitions

6
the first or highest in an ordering or series wordnet
7
Urine; urination. childish, euphemistic
"He might have got up, without the bell's sounding, to do his number one, or number two, in his great big white chamber-pot."
8
The single that has sold the most in a given period.
9
The main goalkeeper of a team, so-called because they wear the number 1 on the back of their kit.
"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."
10
The batsman who opens the batting.
11
A first lieutenant.
12
A large town where theatrical performances may expect to achieve success.
13
Used other than figuratively or idiomatically: see number, one.

Etymology 1

Piecewise doublet of numero uno.

Etymology 2

Piecewise doublet of numero uno.

Unscramble this word: numberone