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.

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 …

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

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.

Supplementary is a little something extra to fill in a gap, like when your teacher suggests supplementary reading material that you may or may not get around to checking out. Supplementary can be an …

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

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

Supplementary typically refers to something that completes or enhances another thing when added to it. In the context of mathematics, particularly in geometry, "supplementary" refers to angles that add up …