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.

Nearby words

  1. supplemental,
  2. supplemental air,
  3. supplemental plumage,
  4. supplemental security income,
  5. supplementally,
  6. supplementary angle,
  7. supplementary angles,
  8. supplementary story,
  9. supplementation,
  10. suppletion

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

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