bondage

Short definition from Wiktionary

Noun

1. 1
   The state of being enslaved or the practice of slavery.
2. 2
   The state of lacking freedom; constraint.
3. 3
   The practice of physically restraining people for sexual pleasure, such as by tying up or shackling.
4. 4
   Applied to clothing with many buckles, zips, etc., associated with punk and goth subcultures.