n.
     - a horizontal plane or line with respect to the distance above or below a given point.
- a height or distance from the ground or another base. ▸a floor within a multi-storey building. 
- a position or stage on a scale of quantity, extent, rank, or quality.
- a flat area of land.
- an instrument giving a line parallel to the plane of the horizon for testing whether things are horizontal. ▸Surveying  an instrument for giving a horizontal line of sight. 
adj.
    - having a flat, horizontal surface. ▸(of a quantity of a dry substance) not rising above the brim of the measure: ![]()  a level teaspoon of salt. 
- at the same height as someone or something else.
- having the same position or value.
- calm and steady:![]()  a level voice. 
v.
 (levels, levelling, levelled; US levels, leveling, leveled)
     - make or become level. ▸demolish (a building or town). 
- make or become equal or similar.
- aim or direct (a weapon, criticism, or accusation).
- 
(level with)
 informal be frank with.
- Surveying  ascertain differences in the height of (land).
Phrase
  
    - do one's level best
 make all possible efforts.
- level of attainment
 Brit. a rating of the ability of a school pupil, on a scale of 1 to 10.
- be level pegging
 Brit. be equal in score or achievement during a contest.
- a level playing field
 a situation in which everyone has an equal chance of succeeding.
- on the level
 informal honest; truthful.
 
  Derivative
  
    - levelly adv.
- levelness n.
 
  Etymology
  ME: from OFr. livel, based on L. libella, dimin. of libra ‘scales, balance’.