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

Extreme; far beyond the norm; fanatical; uncompromising.

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

Situated beyond, or on the farther side. / Beyond what is obvious or evident. / Being intentionally concealed so as to deceive. / (archaic) Happening later; subsequent.

A final statement of terms or conditions made by one party to another, especially one that expresses a threat of reprisal or war.

(physics) Sound with a frequency greater than the upper limit of human hearing, which is approximately 20 kilohertz. / (medicine) The use of ultrasonic waves for diagnostic or therapeutic purposes.

(transitive, intransitive) To treat with ultrasound.

The highest, ultimate point of achievement which can be reached; perfection. / The perfect or most extreme example of its kind; the ultimate.

(grammar, prosody, countable) The final syllable of a word.

A system of inheritance in which the youngest son or youngest child inherits an estate.