To lessen; to dull; to make less intense (said of emotions and non-physical things).
To become damped or deadened.
To become damp or moist.
To make damp or moist; to make moderately wet.
To make (a quantity) smaller.
Of a quantity, to become smaller.
A reduction in the number of stitches, usually accomplished by suspending the stitch to be decreased from another existing stitch or by knitting it together with another stitch. See Decrease (knitting).
An amount by which a quantity is decreased.