1. to look at; to observe or inspect; to see
  2. to consider or regard as; to take it for
  3. to compare; to be equivalent to
  4. (now rare) to show
  5. (now rare) to receive (a present, etc.)

the line of vision or sight - the straight line between an object and one's eyes

to think little of; to slight; to make light of; to look down upon