Pronunciation: (di-krē'sing), [key]
1. becoming less or fewer; diminishing.
2. Math.(of a function) having the property that for any two points in the domain such that one is larger than the other, the image of the larger point is less than or equal to the image of the smaller point; nonincreasing. Cf. increasing (def. 2).
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.