The meaning of SUPPLEMENTARY is added or serving as a supplement : additional. How to use supplementary in a sentence.

If an angle is supplementary to another angle, it forms 180 ° when combined with it.

SUPPLEMENTARY definition: Also of the nature of or forming a supplement; additional. See examples of supplementary used in a sentence.

Factsheet What does the word supplementary mean? There are seven meanings listed in OED's entry for the word supplementary. See ‘Meaning & use’ for definitions, usage, and quotation evidence.

Jan 18, 2026 · Adjective supplementary (comparative more supplementary, superlative most supplementary) Additional; added to supply what is wanted.

Definition of supplementary adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

In the context of mathematics, particularly in geometry, "supplementary" refers to angles that add up to 180 degrees. Any two angles that sum up to 180 degrees are considered as supplementary angles.

Supplementary can be an important part of something or just extra support. The word supplement comes from the Latin supplementum for "something added to fix a deficiency" and the suffix -ary …

1. Also, supplemental. of the nature of or forming a supplement; additional. n. 2. a person or thing that is supplementary.

Supplementary things are added to something in order to improve it. ...the question of whether or not we need to take supplementary vitamins. Provide them with additional background or with …