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
Related formsnon·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. 2019

Examples from the Web for supplementary

Contemporary Examples of supplementary

  • The supplementary budget includes €7.2bn in new taxes, including a big increase in wealth taxes, and €1.5bn in spending cuts.

    The Daily Beast logo
    Weird Euro Facts

    David Frum

    July 18, 2012

  • Here are all the parts to the review, and some supplementary blog posts.

    The Daily Beast logo
    Coming Apart: The Review

    David Frum

    February 9, 2012

Historical Examples of supplementary

British Dictionary definitions for supplementary



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

noun plural -ries

a person or thing that is a supplement
Derived Formssupplementarily 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

Word Origin and History for supplementary

1660s, from supplement + -ary.

Online Etymology Dictionary, © 2010 Douglas Harper