Natural ability to acquire knowledge or skill. (noun)
The condition of being suitable. (noun)
Examples of word aptitude
By then, the word aptitude, implying that students were being tested for natural fitness or inborn talent, would no longer do.
I agree that any genetic differences in aptitude probably predated selective breeding by slave owners.
Now, however, "fresh research adds to the debate about gender difference in aptitude for mathematics, including efforts to explain the relative scarcity of women among professors of science, math, and engineering."
A study by the RAND Corporation, commissioned by the Pentagon and published in 2005, evaluated several factors that affect military performance — experience, training, aptitude, and so forth — and found that aptitude is key.
And in one of the first long-term aptitude studies, researchers found that preemies aren't necessarily destined for a lifetime of learning problems.