Decrease

1. A becoming less; gradual diminution; decay; as, a decrease of revenue or of strength.
2. To grow less, -- opposed to increase; to be diminished gradually, in size, degree, number, duration, etc., or in strength, quality, or excellence; as, they days decrease in length from June to December.
3. The wane of the moon.
4. To cause to grow less; to diminish gradually; as, extravagance decreases one's means.