A diatonic interval which is the larger of the two intervals which encompass 2 degrees of the of the diatonic scale (the smaller being the minor-2nd or diatonic semitone). The major-2nd is comprised of 1 tone and zero semitones, and is synonymous with "tone", "whole-tone" and "whole-step". Examples are:
maj2 maj2 maj2 maj2 maj2 / \ / \ / \ / \ / \ C D E F G A B C t t s t t t s major-2nd = 1t + 0s
The major-2nd is one chromatic-semitone larger than the minor-2nd. Raising the major-2nd by one more chromatic semitone results in the augmented-2nd.