(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

(meteorology) The lowest level at which the wind becomes geostrophic. In practice, the geostrophic wind level is between 1.2 kilometers (3,928 feet) and 1.6 kilometers (5,238 feet). This wind level probably marks the upper limit of frictional influence of the earth's surface. The geostrophic wind level may be considered to be the top of the planetary boundary layer, that is, the base of the free atmosphere.

(computing, Internet) A domain that is immediately subordinate to a top-level domain (whose name appears after it, with a period separating the two).

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.

A member of the Hebrew tribe of Levi. / (obsolete, humorous) A clergyman. / (now historical) A type of loose women's dress.

(idiomatic) Sensible; rational; possessing sound judgment.

The level of a body of water, especially when measured above a datum line. / The level of the water table below ground. / The waterline of a ship.