Conscious understanding of something.
That which is detected by the five senses; not necessarily understood (imagine looking through fog, trying to understand if you see a small dog or a cat); also that which is detected within consciousness as a thought, intuition, deduction, etc.
Vision (ability)
The organisation, identification and interpretation of sensory information.
Acuity
Sanity.
Humour, especially when clever or quick.
A person who tells funny anecdotes or jokes; someone witty.
The ability to think quickly; mental cleverness, especially under short time constraints.
Intellectual ability; faculty of thinking, reasoning.
Intelligence; common sense.