Entry 2 senses · 2 variants Webster, 1913

Complementary

/kŏm'plĭ-mĕnʹtə-rē/ · Com·ple·men·ta·ry · IPA /ˌkɑmplɪˈmɛnt(ə)ɹi/

01 a. Serving to fill out or to complete; as, complementary numbers.

1.
Serving to fill out or to complete; as, complementary numbers.

Phrases & compounds

Complementary colors — See under Color.

Complementary angles — two angles whose sum is 90°.

02 n. One skilled in compliments.

1.
One skilled in compliments.[Obs.]