The IQ of President George Bush.

The loneliest number that you'll ever do.

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.

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.

the number that comes before the number 2

1 is short for one love.

It is used for good-bye or 'Im out'

meaning goodbye or i will see you later.