Outre vs Ultra - What's the difference?

As adjectives the difference between outre and ultra

is that outre is very unconventional while ultra is ultra, extremist.

ultra, extremist.

(head)

* ----

(en adjective)

Extreme; far beyond the norm; fanatical; uncompromising.

an ultra''' reformer; '''ultra measures

(en noun)

An ultraroyalist in France.

* 1974 , (Lawrence Durrell), Monsieur , Faber & Faber 1992, p. 37:

*:"At any rate that is what he explained to me," I said hastily while the lawyer rubbed his long ultra' s nose and sighed.

An extremist.

* 2005', " Foreign '''ultra killed, three injured in J&K," ''The Times of India , 29 Dec. (retrieved 21 Apr. 2009):

Five militants were nabbed while four ultras of Harkat-ul-Jehad-e-Islami (HuJI) gave themselves up.

(usually, capitalised) Code name used by British codebreakers during World War 2 for decrypted information gained from the enemy.