(military) A rank of officer in the army and the US air force, between captain and lieutenant colonel. / An officer in charge of a section of band instruments, used with a modifier.

(intransitive) Used in a phrasal verb: major in.

Greater in dignity, rank, importance, significance, or interest. / Greater in number, quantity, or extent. / Notable or conspicuous in effect or scope.

(US, Canada, education) To take (something) as one's major field of study in an institute of tertiary education (such as a college or university).

(music) The major key with A as its tonic, with the notes A, B, C♯, D, E, F♯, and G♯, the key signature of which has three sharps. / (music) The major chord with a root of A.

Synonym of majorly

plural of majorant

(mathematics) A function, or an element of a set, that dominates others or is greater than all others.

(obsolete) increase; enlargement

plural of majoration