To destroy or impair the force and effect of; lessen the extent, authority, etc., of.To detract from; abate; disparage.To take away; retrench; remove (from).To take away a part; detract; make an improper or injurious abatement: with from.To fall away in character or conduct; degenerate.Synonyms Depreciate, Derogate from, etc. See decry.Lessened in extent, estimation, character, etc.; invalidated; degenerate; degraded; damaged.