n.[C]

1. 補充物，補足物；配對物[（+to/of）]
   Homework is a necessary complement to classroom study.

   家庭作業是課堂教學的必要補充。

2. 足數；全數，整套
   the entire complement of an embassy

   大使館全體人員

3. （船的）人員定額
4. 【語】補語
5. 【數】餘；補；補數
6. 【音】轉位音程
7. 【醫】（血清中的）補體

vt.

1. 補充，補足；與……相配
   This wine complements the food perfectly.

   用這酒配這些菜餚，相得益彰。

n.

1. a thing that contributes extra features to something else so as to enhance or improve it.
2. the number or quantity that makes something complete:
   we have a full complement of staff.
3. Grammar  a word, phrase, or clause governed by a verb that completes the meaning of the predicate.
   ▸an adjective or noun that has the same reference as either the subject or object (as mad in he is mad or he drove her mad).
4. Physiology  a system of proteins present in blood plasma which combines with antigen–antibody complexes and phagocytes to bring about the destruction of microorganisms and foreign cells.
5. Geometry  the amount by which a given angle is less than 90°.

v.