complement
nounUK /ˈkɒmplɪmənt/
US /ˈkɑːmplɪmənt/
A complement is something that goes well with something else and makes it better.
The red scarf is a perfect complement to her blue coat.
RELATED WORDS
OTHER MEANINGS
2. In grammar, a word or phrase that completes the meaning of a verb or adjective.
In 'She is happy,' the word 'happy' is a complement.
3. In math, the amount needed to make something complete, like angles adding to 90 degrees.
The complement of a 30-degree angle is 60 degrees.
4. A group of proteins in the blood that helps the immune system fight infection.
The complement system helps destroy harmful bacteria.