Definition of

Offensive

1. (noun, act) the action of attacking an enemy
2. (adj, all) substitute a harsher or distasteful term for a mild one
3. (adj, all) unpleasant or disgusting especially to the senses
4. (adj, all) morally offensive
   an unsavory scandal
5. (adj, all) causing anger or annoyance
6. (adj, all) for the purpose of attack rather than defense
7. (adj, all) violating or tending to violate or offend against
   considered such depravity offensive against all laws of humanity
8. (adj, all) causing or able to cause nausea
   nauseous offal
   a sickening stench

via WordNet, Princeton University