Noah Webster's Dictionary 1. (n.) Reduction in size, quantity, or degree; the act of diminishing, or of making or becoming less; state of being diminished; -- opposed to augmentation or increase. 2. (n.) The act of lessening dignity or consideration, or the state of being deprived of dignity; a lowering in estimation; degradation; abasement. 3. (n.) Omission, inaccuracy, or defect in a record. 4. (n.) In counterpoint, the imitation of, or reply to, a subject, in notes of half the length or value of those the subject itself.

Multi-Version Concordance Diminution (1 Occurrence) Romans 11:12 and if the fall of them 'is' the riches of a world, and the diminution of them the riches of nations, how much more the fulness of them? (YLT)