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Webster 1913 Edition

Noun.

The act of making noble, or of exalting, dignifying, or advancing to nobility.

Bacon.

That which ennobles; excellence; dignity.

Noun.

The act of advancing to nobility.

Exaltation; elevation in degree or excellence.

ennoblement ‎(countable and uncountable, plural ennoblements)

state of being noble

act of ennobling or something which ennobles