[ suhp-luh-men-tuh-ree ]
/ ˌsʌp ləˈmɛn tə ri /


Also supplemental. of the nature of or forming a supplement; additional.

noun, plural sup·ple·men·ta·ries.

a person or thing that is supplementary.

Origin of supplementary

First recorded in 1660–70; supplement + -ary

OTHER WORDS FROM supplementary

non·sup·ple·men·ta·ry, adjectivepre·sup·ple·men·ta·ry, adjectiveun·sup·ple·men·ta·ry, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Examples from the Web for supplementary

British Dictionary definitions for supplementary

/ (ˌsʌplɪˈmɛntərɪ, -trɪ) /


forming or acting as a supplementAlso (less commonly): supplemental (ˌsʌplɪˈmɛntəl)

noun plural -ries

a person or thing that is a supplement

Derived forms of supplementary

supplementarily or rare supplementally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012