Pronunciation: (ri-gres'iv), [key]
1. regressing or tending to regress; retrogressive.
2. Biol.of, pertaining to, or effecting regression.
3. (of tax) decreasing proportionately with an increase in the tax base.
4. Logic.obtained from or characterized by backward reasoning.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.