Definitions of complement

  1. To complete; to supply a lack in.
  2. To add or form a complement to; supplement.
  3. something added to complete or make perfect; " a fine wine is a perfect complement to the dinner"
  4. either of two parts that mutually complete each other
  5. a word or phrase used to complete a grammatical construction
  6. a complete number or quantity; " a full complement"
  7. one of a series of enzymes in the blood serum that are part of the immune response
  8. That which fills up or completes; the quantity or number required to fill a thing or make it complete.
  9. That which is required to supply a deficiency, or to complete a symmetrical whole.
  10. Full quantity, number, or amount; a complete set; completeness.
  11. A second quantity added to a given quantity to make it equal to a third given quantity.
  12. The whole working force of a vessel.
  13. The interval wanting to complete the octave; -- the fourth is the complement of the fifth, the sixth of the third.
  14. A compliment.
  15. To compliment.
  16. Full number or quantity; as, the regiment had its complement of men; something that completes that which was not complete; the angle or arc by which a given angle or arc falls short of 90 degrees.
  17. That which completes or fills up: full number or quantity.
  18. That which completes; the full number.
  19. Full number; completeness; that which completes; an accessory.
  20. That which completes or makes up the full number or quantity; the full number or quantity; fulness; that which is is added, not as necessary, but as ornamental; something adventitious to the main thing. The complement of an arc or angle, the difference between the arc or angle and 90
  21. A filling up or completing; that which is wanted to complete or fill up some quantity or thing; something added by way of ornament.