<p><strong>Noun</strong></p><ul><li>something that completes or makes perfect.</li><li>the quantity or amount that completes anything.</li><li>either of two parts or things needed to complete the whole; counterpart.</li><li>full quantity or amount; complete allowance.</li><li>the full number of officers and crew required on a ship.</li><li>a word or group of words that completes a grammatical construction in the predicate and that describes or is identified with the subject or object.</li><li>any word or group of words used to complete a grammatical construction, especially in the predicate, including adverbials.</li><li>the quantity by which an angle or an arc falls short of 90° or a quarter of a circle.</li><li>the set of all the elements of a universal set not included in a given set (Mathematics).</li><li>the interval that completes an octave when added to a given interval (Music).</li><li>a system in vertebrate blood of 12 or more proteins that react in a cascade to a cell displaying immune complexes or foreign surfaces.</li><li>any of the proteins in the complement system, designated C1, C2, etc.</li><li>complementary color.</li></ul><p><strong>Verb (used with object)</strong></p><ul><li>to complete; form a complement to.</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to compliment (obsolete).</li></ul><p><strong>End of Response</strong></p>