Defense

Defense or defence may refer to:

Tactics and strategy

a chess opening by Black
HMS Defence, Royal Navy ships of this name
Defense of a doctoral thesis, also called viva voce; see dissertation
La Défense, a business district in Paris
- The Grande Arche, commonly known as Arche de la Défense, in Paris
DeFence, an art project
Haganah (Hebrew for "The Defence"), a paramilitary organization in British Palestine
Defence mechanism
Defense in depth (computing)