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explanatory

[ik-splan-uh-tawr-ee, -tohr-ee]
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adjective
  1. serving to explain: an explanatory footnote.
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Sometimes ex·plan·a·tive [ik-splan-uh-tiv] /ɪkˈsplæn ə tɪv/.

Origin of explanatory

From the Late Latin word explānātōrius, dating back to 1610–20. See explain, -tory1
Related formsex·plan·a·to·ri·ly, ex·plan·a·tive·ly, adverbnon·ex·plan·a·tive, adjectivenon·ex·plan·a·to·ry, adjectivepre·ex·plan·a·to·ry, adjectiveun·ex·plan·a·to·ry, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for explanative

explanatory

explanative

adjective
  1. serving or intended to serve as an explanation
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Derived Formsexplanatorily, 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 explanative

explanatory

adj.

1610s, from or modeled on Late Latin explanatorius "having to do with an explanation," from Latin explanat-, past participle stem of explanare (see explanation).

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Online Etymology Dictionary, © 2010 Douglas Harper