Noun

1. A general conscious awareness
2. The meaning of a word or expression; the way in which a word or expression or situation can be interpreted
3. The faculty through which the external world is apprehended
4. Sound practical judgment
5. A natural appreciation or ability
6. Street names for marijuana

Verb

1. Perceive by a physical sensation, e.g., coming from the skin or muscles
2. Detect some circumstance or entity automatically
3. Become aware of not through the senses but instinctively
4. Comprehend