1. Of or relating to concepts or mental conception: conceptual discussions that antedated development of the new product.
2. Of or relating to conceptualism.

[Medieval Latin conceptuālis, from Late Latin conceptus, a thought. See concept.]

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.