1.Definition: a change downward

"There was a decrease in his temperature as the fever subsided", "There was a sharp drop-off in sales"

Related Noun(s):lessening

Category: General

2.Definition: a process of becoming smaller or shorter

Related Noun(s):decrement

Category: General

3.Definition: the act of decreasing or reducing something

Related Noun(s):diminution, reduction

Category: General

4.Definition: the amount by which something decreases

Related Noun(s):decrement

Category: General