leveller

/L EH1 V AH0 L ER0/
adjective
  1. 1

    The same height at all places; parallel to a flat ground.

    โ€œThis table isn't quite level; see how this marble rolls off it?โ€

  2. 2

    At the same height as some reference; constructed as level with.

    โ€œWe tried to hang the pictures so that the bottom of the frames were level with the dark line in the wallpaper.โ€

  3. 3

    Unvaried in frequency.

    โ€œHis pulse has been level for 12 hours.โ€

  4. 4

    Unvaried in volume.

    โ€œHis voice has been unchanged. It has been level for 12 hours.โ€

  5. 5

    Calm.

    โ€œHe kept a level gaze.โ€

  6. 6

    In the same position or rank.

  7. 7

    Straightforward; direct; clear.

  8. 8

    Well balanced; even; just; steady; impartial.

    โ€œa level head; a level understandingโ€

  9. 9

    Of even tone; without rising or falling inflection; monotonic.

  10. 10

    Perpendicular to a gravitational force.

    โ€œThe earth's oceans remain level in relation to the pull of gravity.โ€

noun
  1. 1

    A person or thing that levels.

    โ€œA soil leveller is used to prepare the field before sowing.โ€

  2. 2

    (especially) Something that transcends peopleโ€™s differences (such as social class, wealth, etc.); something that tends to eliminate advantages and disadvantages.

  3. 3

    A person holding a political opinion in favor of eliminating disparities between the haves and the have nots.

  4. 4

    An equaliser.

Source: https://en.wiktionary.org/wiki/level, https://en.wiktionary.org/wiki/leveller