(business) An event consisting of level setting / (business) A state of mutual understanding among parties

Taking place or existing at a high level, altitude or elevation. / Of or pertaining to a person of a high social position or high rank within a hierarchy or organization. / Consisting of such people.

(physics) Any of the discrete stable energies that a quantum mechanical system (such as the electrons of an atom) can have. / Used other than figuratively or idiomatically: see energy, level.

(chiefly Britain) An at-grade crossing between a railway line and an ordinary road, with rails and road at the same level.

(chemistry) The energy level of the electrons (core electrons) occupying the completely filled shells under the valence shell.

relatively unimportant / not intense / (computing) of, or relating to a program, or to code in which each statement corresponds to a single machine instruction / detailed

Highest. / Best. / (Internet) Applied to domains at the highest level, such as .uk covering all sites for the United Kingdom.

(programming) read-eval-print loop

(transitive, literally and figuratively) To raise to the same level or status; to improve so as to make as good as others.

(idiomatic) Sensible; rational; possessing sound judgment.