Set

[Sarah]

Gang, specifically a subsidiary gang. For example, Piru Bloods is a set of the Bloods Gang.

[Greta]

An [undefined] term in [mathematics], which [ironically] has the most number of definitions in a dictionary.

[Oralee]

Group of people, usually gang affiliated, for a particular neighborhood.
In skateboarding, [rollerblading], or similar sports, a set of stairs in which to perform a trick over.
In reference to a pair of womens breasts.
Another term for ready.
In reference to a [syringe] or needle for drugs, particularly in the [Tri-state area].
A drug spot, particularly in cities, where drug dealing is notorious and well organized.
In reference to someones house.
A pair.

[Kai]

when a group of friends [get together] to [chill], drink, smoke and just to [have a good] time.

[Justin Bieber]

A term that anyone and everyone can say about anything [and everything].

Also, a [substitute] for any [desire].

[Little_Girl]

A set is a [specific] [subdivision] of the overall [gang].

[Rihanna]

The [mathematical] set is traditionally known as a [collection] of objects. It is one of the most general and useful structures in [mathematics].

[Kai]

a combined [stretch] of music created by [a dj]. ussually about an hour to six or even [eight hours] long.
consist of several songs or beats.

[Vania]

Set in Tennis. A set consists of up to 12 games and a tiebreak - except for the final set, which must be won by two clear games, and therefore has no limit. A set is won when a player has won six games with at least a two-game advantage. If the score is 6-5, then the set can be won 7-5; at 6-6 the set goes to a tie-break.

[Julian]

Set in Snooker. Two object balls are touching in such a manner that when contacted by the cue ball, at any angle, the second object ball will be potted.

[Merna]

Set in Real Tennis. Each set is a separate unit, and the player has to win a pre-agreed upon number of sets to win the match.