1. Having the left brain dominant.
2. Of or relating to the thought processes, such as logic and calculation, generally associated with the left brain.
3. Of or relating to a person whose behavior is dominated by logic, analytical thinking, and verbal communication, rather than emotion and creativity.

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.