level

noun
  1. a position on a scale of amount, quantity, extent, or quality
  2. a horizontal plane or line with respect to the distance above or below a given point
  3. a floor of a building
adjective
  1. having a flat, horizontal surface; not sloping
  2. equal in position, rank, or degree
verb
  1. to make flat or smooth
  2. to aim or direct something

Examples