n.
1.a word or phrase used to complete a grammatical construction
2.a complete number or quantity
3.number needed to make up whole force
4.something added to complete or make perfect
5.one of a series of enzymes in the blood serum that are part of the immune response
6.either of two parts that mutually complete each other complement v.
1.make complete or perfect
Idiom of the Day
so much
a large quantity of something
There was so much rain in the spring that our garden did not grow well.