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noun, plural in·ter·me·di·ar·ies.
  1. an intermediate agent or agency; a go-between or mediator.
  2. a medium or means.
  3. an intermediate form or stage.
  1. being between; intermediate.
  2. acting between persons, parties, etc.; serving as an intermediate agent or agency: an intermediary power.

Origin of intermediary

1785–95; < Late Latin intermedi(um) intervening place + -ary; see intermediate1

Synonyms for intermediary

See more synonyms for on Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for intermediary


noun plural -aries
  1. a person who acts as a mediator or agent between parties
  2. something that acts as a medium or means
  3. an intermediate state or period
  1. acting as an intermediary
  2. situated, acting, or coming between; intermediate
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 intermediary

1788 (adj.); 1791 (n.), from French intermédiaire (17c.), from Medieval Latin intermedium, from Latin intermedius (see intermediate).

Online Etymology Dictionary, © 2010 Douglas Harper