Inclined to teach or moralize excessively.(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 "didactic" in a sentence
"7:12: Sends text to Brian Williams of NBC News correcting him on improper use of the term "didactic.""
"The degree to which the characters are bound to their milieu is made apparent at every turn — sometimes, in didactic bits of dialogue, almost too apparent."
"Teens are such an open audience, and the world of YA literature has evolved in the past years, so the age of thinking about teen novels as needing to be limited or didactic is definitely over."