breakaway

Short definition from Wiktionary

Adjective

1. 1
   Having broken away from a larger unit.
2. 2
   Capable of breaking off without damaging the larger structure.
3. 3
   Occurring during or as a result of a breakaway (see Noun)
4. 4
   Enjoying rapid popular success.

Noun

1. 1
   The act of breaking away from something.
2. 2
   A group of riders which has gone ahead of the peloton.
3. 3
   A situation in the game where one or more players of a team attack towards the goal of the other team without having any defenders in front of them.
4. 4
   The act of getting away from one's opponent; the separation of the boxers after a spell of infighting.
5. 5
   A stampede of animals.
6. 6
   An animal that breaks away from a herd.
7. 7
   An eroding steep slope on the edge of a plateau; an escarpment.
8. 8
   A channel of floodwater that has burst from its usual course; or the track or channel eroded by the water.
9. 9
   A particular yo-yo trick http://yoyo.wikia.com/wiki/Breakaway.
10. 10
    A swing dance in which the leader occasionally swings the follower out into an open position.
11. 11
    An item of scenery designed to be broken or destroyed during the performance.