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[suhp-luh-men-tuh-ree] /ˌsʌp ləˈmɛn tə ri/
Also, supplemental. of the nature of or forming a supplement; additional.
noun, plural supplementaries.
a person or thing that is supplementary.
Origin of supplementary
1660-70; supplement + -ary
Related forms
nonsupplementary, adjective
presupplementary, adjective
unsupplementary, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for supplementary
Contemporary Examples
Historical Examples
  • These books are admirable for supplementary reading classes.

    Arbor Day Leaves N.H. Egleston
  • Persons are supplementary to the primary teaching of the soul.

    Essays, First Series Ralph Waldo Emerson
  • It is, so to speak, a double-ender, being provided with a supplementary head at the point where the feet are usually situated.

  • This is supplementary to matter contained in the State chapters.

  • A supplementary act was therefore passed which prevented the Supreme Court from holding its usual session.

    Union and Democracy Allen Johnson
  • A supplementary volume of illustrations was issued with this last edition.

    The Book-Hunter at Home P. B. M. Allan
  • The only question is whether they will come as supplementary to or in substitution for the League.

    The New Germany George Young
  • You suggest that there shall be a supplementary investigation?

    Fantmas Pierre Souvestre
British Dictionary definitions for supplementary


/ˌsʌplɪˈmɛntərɪ; -trɪ/
forming or acting as a supplement Also (less commonly) supplemental (ˌsʌplɪˈmɛntəl)
noun (pl) -ries
a person or thing that is a supplement
Derived Forms
supplementarily, (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
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Word Origin and History for supplementary

1660s, from supplement + -ary.

Online Etymology Dictionary, © 2010 Douglas Harper
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