1. Inadequate strength or ability; lack of capacity.
2. A defect or handicap; a disability.
3. Law. Something that renders one legally ineligible; a disqualification.

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.