the GNU version of the Collaborative International Dictionary of English
n. Lack of aptitude.
The Century Dictionary and Cyclopedia
n. Lack of aptitude or adaptation; unsuitableness; unfitness.
n. Lack of readiness; unskilfulness; awkwardness; unhandiness: as, inaptitude in workmanship. See ineptitude.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a lack of aptitude
Word Usage
"While there seem to be more and more programs to encourage girls who are interested in the sciences in engineering, old attitudes about the aptitude (or more accurately, inaptitude) of women in technical fields seem to be a long time in dying."