Lacking propriety or good taste. See Synonyms at improper.(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 "indecorous" in a sentence
"To exist in a modern world, we must often ignore its indecorous parts: the rivers of waste we produce, the intersexual fish we create."
"His affability and courteousness in several candidate debates made their gentlest criticism of him look unreasonable and indecorous."
"In American fiction, at least, the opposition between the hulking, indecorous novel and the delicate short story just doesn't very cogently apply."