—n.dē'krēs, di-krēs'), [key]
—v., -creased, -creas•ing,
to diminish or lessen in extent, quantity, strength, power, etc.: During the ten-day march across the desert their supply of water decreased rapidly.
to make less; cause to diminish: to decrease one's work load.
1. the act or process of decreasing; condition of being decreased; gradual reduction: a decrease in sales; a decrease in intensity.
2. the amount by which a thing is lessened: The decrease in sales was almost 20 percent.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.