An ultraroyalist in France. / An extremist, especially an ultranationalist.

Extreme; far beyond the norm; fanatical; uncompromising.

Greater than normal quantity or importance, as in ultrasecret. / Beyond, on the far side of, as in ultraviolet. / Beyond, outside of, as in ultrasonic.

plural of ultra

(law) beyond the legal power or authority of a person or body

Very, extremely, or exceedingly high.

Alternative spelling of ultra lounge

A nightclub that has a subdued atmosphere and facilities for social intercourse

(of a Jew) Very strictly observant; Haredi; being either Hasidic or Litvish (Misnagdic).

Extremely diffuse. / (astronomy) Specifically, designating a type of galaxy with a very low proportion of visible stars compared to the Milky Way, and hence a very low luminosity.