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expeditionary

[ek-spi-dish-uh-ner-ee]
adjective
  1. pertaining to or composing an expedition: an expeditionary force.
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Origin of expeditionary

First recorded in 1700–10; expedition + -ary
Related formspre·ex·pe·di·tion·ar·y, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for expeditionary

expeditionary

adjective
  1. relating to or constituting an expedition, esp a military onean expeditionary force
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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