diminution

diminution is a Noun

Definition:

[1] The act of diminishing, or of making or becoming less; state of being diminished; reduction in size, quantity, or degree; -- opposed to augmentation or increase.

[2] The act of lessening dignity or consideration, or the state of being deprived of dignity; a lowering in estimation; degradation; abasement. The world`s opinion or diminution of me. Eikon Basilike. Nor thinks it diminution to be ranked In military honor next. Philips.

[3] Omission, inaccuracy, or defect in a record.

[4] In counterpoint, the imitation of, or reply to, a subject, in notes of half the length or value of those the subject itself.