What is the meaning of Ultra-?

Greater than normal quantity or importance, as in ultrasecret.

Beyond, on the far side of, as in ultraviolet.

Beyond, outside of, as in ultraterrestrial.

Excessively, to an extreme, as in ultramicroscopic.

intensely, extremely, or exceptional

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ultra- (beyond, on the far side of; beyond, outside of)

ultra- (greater than normal quantity or importance, excessively, to an extreme)

ultra- (beyond, on the far side of; beyond, outside of)

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Source: wiktionary.org