Measuring instrument to ensure piece is flush

noun

1. A device for establishing a horizontal line or plane by means of a bubble in a liquid that shows adjustment to the horizontal by movement to the center of a slightly bowed glass tube
2. A measurement of the difference of altitude of two points by means of a level
3. Horizontal condition
4. An approximately horizontal line or surface taken as an index of altitude

   "Charts were arranged at eye level."

5. A practically horizontal surface or area (as of land)

   "the level of the plateau"

6. A position in a scale or rank (as of achievement, significance, or value)

   "funded at the national level"

7. A line or surface that cuts perpendicularly all plumb lines that it meets and hence would everywhere coincide with a surface of still water
8. The plane of the horizon or a line in it
9. A horizontal passage in a mine intended for regular working and transportation
10. A concentration of a constituent especially of a body fluid (such as blood)

    "a normal blood-sugar level"

11. The magnitude of a quantity considered in relation to an arbitrary reference value
12. One of a series of discrete parts through which a player moves or progresses during the course of a game (such as a video game)

    "A commonly held belief among developers is that the opening level of a well-programmed game teaches the player what thematic rules to anticipate going forward."

verb

1. To make (a line or surface) horizontal make flat or level

   "level a field"

2. To bring to a horizontal aiming position
3. Aim, direct

   "leveled a charge of fraud"

4. To bring to a common level or plane equalize

   "love levels all ranks"

5. To lay level with or as if with the ground raze
6. To knock down

   "leveled him with one punch"

7. To make (something, such as color) even or uniform
8. To find the heights of different points in (a piece of land) especially with a surveyor's level
9. To attain or come to a level

   "The plane leveled off at 10,000 feet."

10. To aim a gun or other weapon horizontally
11. To bring persons or things to a level
12. To deal frankly and openly
13. to make (a line or surface) horizontal : make flat or level
14. to bring to a horizontal aiming position
15. aim, direct

adjective

1. Having no part higher than another conforming to the curvature of the liquid parts of the earth's surface
2. Parallel with the plane of the horizon horizontal
3. Even or unvarying in height
4. Equal in advantage, progression, or standing
5. Proceeding monotonously or uneventfully
6. Reasonable, balanced

   "arrive at a justly proportional and level judgment on this affair"

7. Distributed evenly

   "level stress"

8. Being a surface perpendicular to all lines of force in a field of force equipotential
9. Suited to a particular rank or plane of ability or achievement

   "top-level thinking"

10. Of or relating to the spreading out of a cost or charge in even payments over a period of time

noun

1. Grade crossing

verb

1. To approach or reach a steady rate, volume, or amount stabilize

   "expect prices to level off"

noun phrase

1. The probability of rejecting the null hypothesis in a statistical test when it is true

verb

1. To advance or improve (oneself, someone else, or something) in or as if in a game

   "Collect cards and magic potions, then level up your favourite dragons to increase their abilities."

phrasal verb

1. To stop going up or down

   "Divorce rates are leveling out for the first time in decades."

adjective

1. Even with one another in a contest or competition

   "The candidates are level-pegging in all the opinion polls."

noun

1. A state in which conditions in a competition or situation are fair for everyone

   "He wants the government to revise the tax code to provide a level playing field for all companies."