- Lacking in harmony; incompatible: a joke that was incongruous with polite conversation. (adjective)
- Not in agreement, as with principles; inconsistent: a plan incongruous with reason. (adjective)
- Not in keeping with what is correct, proper, or logical; inappropriate: incongruous behavior. (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.