notable in effect or scope; important
a major improvement
said esp of a musical scale or mode: having semitones between the third and fourth and the seventh and eighth steps
ofdenoting or based on a major scale
a sonata in C major
denoting a musical interval equivalent to the distance between the first and the second, third, sixth, or seventh notes of a major scale
a major third
said of a chord: having a musical interval of four semitones between the lowest note and the next note above it
dated used after a surname: the elder of two brothers in a British public school
Jennings major
[Middle English maiour from Latin major, compar of magnus great, large]