The total chemical potential for electrons.

A delicate level pivoted so as to tilt when two parts of a measuring apparatus come into contact with each other; used in precise determinations of lengths and in the accurate graduation of instruments.

A subject-based qualification superseded in England by GCSEs, but still available as an international examination.

Alternative spelling of O-level

(video games) The maximum attainable level of the player character, often in role-playing video games. Level caps may be raised in subsequent playthroughs or expansion packs/downloadable content.

plural of level cap

(idiomatic) The very best that one can do

A tool employing a chamber with a colored liquid and an air bubble, used to determine if a surface is level horizontally, vertically, or at a 45-degree angle.

Alternative spelling of level-headed

(intransitive) to equalize / (transitive) to cause something to equalize