decrease

noun

1.
a change downward
Antonym:
increase
Derived from:
decrease
2.
a process of becoming smaller or shorter
Antonym:
increase
Derived from:
decrease
3.
the amount by which something decreases
Antonym:
increase
Derived from:
decrease
4.
the act of decreasing or reducing something
Antonym:
increase
Derived from:
decrease