1.a word or phrase used to complete a grammatical construction
2.a complete number or quantity;
a full complement
3.number needed to make up whole force;
a full complement of workers
4.something added to complete or make perfect;
a fine wine is a perfect complement to the dinner
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
1.make complete or perfect; supply what is wanting or form the complement to;
I need some pepper to complement the sweet touch in the soup