Serving or intended to explain: an explanatory paragraph. (adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "explanatory" in a sentence
"The Dominican Congress added what it called explanatory articles to the law by which it approved the convention but made no change therein."
"RL is seriously lacking in explanatory mouse-overs."
"He caught her curious and speculative eyes fixed on his hands, and, being in explanatory mood, he said: — I just come down the Coast on one of the Pacific mail steamers."