complementary

/ˌkɑmpləˈmɛntəri/
adjective
  1. Combining in such a way as to enhance or emphasize the qualities of each other or another thing.
    • The restaurant offers a complementary glass of wine with every dinner entree.
    • Their skills are complementary; she is good at planning, and he is good at executing.
    • The two colors are complementary and look great together in the painting.
  2. (of two angles) summing to 90 degrees.
    • In a right triangle, the two acute angles are complementary.
    • The teacher asked the students to find the complementary angle of 45 degrees.
    • If one angle is 30 degrees, its complementary angle is 60 degrees.
Antonyms
noun
  1. A thing that completes or brings to perfection.
    • The side dish was a tasty complementary to the main course.
    • Her calm demeanor is a good complementary to his energetic personality.
    • The new software is a perfect complementary to the existing system.
What does "complementary" mean? | whatsthatwordmean | whatsthatwordmean