Advanced Subsidiary level, in the UK: the exam taken in the first year of the sixth form, as a first stage in getting to the A-levels (A2) at the end of the sixth form. The modular format makes the distinction less clear.

(mathematical analysis) The set of values x for which a real-valued function f(x) is equal to a given constant.

(business) To establish a baseline of mutual understanding

(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.

Alternative spelling of level-headed

Alternative spelling of AS-level

Alternative spelling of A level

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