Top definition
The only whole number which when added to itself is greater than when multiplied by itself—when addition needn't always be less than multiplication.
The number 1 is the only number that doesn't change any number by multiplication or when used as a divisor: 2 × 1 = 2 and 2 ÷ 1 = 2.
via giphy
by MathPlus December 15, 2016
Get a 1 mug for your dad Günter.
2
The devil’s number that makes you feel bad or look stupid if you are not ranked top in everything you plan to do in life—the lie that not being first is only reserved for the weaklings.
Singapore’s obsession in being No. 1 in business, education, and technology is taking its toll on its oft-underrated, but overpaid citizens, who are told that if they’re not the world’s most productive or smart workers, they’re no different from their counterparts in any developing country.
via giphy
by MathPlus November 12, 2017
Get a 1 mug for your mate Rihanna.
4
The loneliest number that you'll ever do.
2 can be as bad as 1, its the loneliest number since the number 1.
by WAGMIRE October 14, 2005
Get a 1 mug for your coworker Trump.
5
It is brought from New York and it is short for ONE LOVE, people use it as a departure. When you talk to some one your close 2 or even a friend you would say 1, befor you get off the phone or when your leaving your freind or family.
Jonella: well i gotta go so call me later ok!
Devin: aight das kool imma hit'chu up ~1~
by Nitrizzy February 24, 2005
Get a 1 mug for your father-in-law José.
6
1 is short for one love.

It is used for good-bye or 'Im out'
Keith:yo bb im 'bout to leave
BB: iight keith, 1
Keith:1
by Bahamaboy06 July 10, 2005
Get a 1 mug for your daughter-in-law Helena.
7
A: The first natural number.

B: Binary code for "On" or, in images, a black pixel.

C: Number used in replacement for an exclamation mark in chatpeak/1337speak circumstances where one or more users is saying something exiting. See example.
A: 1, 2, 3, 4...

B: 0010110101101001010

C: Lyk ZOMG that is t3h pwnsomest!!!11!1!11one
by Kazyan October 02, 2006
Get a 1 mug for your brother-in-law Manafort.