To apprehend in thought so as to fix and hold in the mind; to memorize.
To generate an idea.
The actual existence supposed to correspond with an idea; the correlate in real existence to the idea as a thought or existence.
Produced by an idea.
To grasp a concept fully in one's mind, especially (of words, statements, art, etc.) to be aware of the meaning of and (of people) to be aware of the intent of.
To believe, to think one grasps sufficiently despite potentially incomplete knowledge.
To stand underneath, to support.