An amount by which a quantity decreases or is decreased.
After six years of constant growth, the company reported a slight decrease in sales last year.
From Middle English decresen, alteration of discresen, from Anglo-Norman, Old French descreistre (French: décroître), from Latin decrescere.
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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).