Defiant
Defiant (English for "defiant") stands for:
- Boulton Paul Defiant , British fighter aircraft in World War II
- Sikorsky / Boeing SB-1 Defiant , a military helicopter and technology demonstrator (first flight planned for 2017/2018; status 2017)
- HMS Defiant , the name of several fictional British warships
- USS Defiant , name of several fictional spaceships in the Star Trek universe, see spaceships and space stations in the Star Trek universe