ULTRA
- extremist, as in politics, religion, fashion, etc.
- the British code name for intelligence gathered by decrypting German wireless communications enciphered on the Enigma machine during World War II
- going beyond others or beyond due limit extreme
- an advocate of extreme measures, also ULTRAIST [n -S]
- going beyond what is usual or ordinary; excessive; extreme
- an ultraist (an advocate of extreme measures) [n ULTRAS]