What is the meaning of Major?

noun

• A commissioned military officer in the United States Army or Air Force or Marines; below lieutenant colonel and above captain.
• British statesman who was prime minister from 1990 until 1997 (born in 1943.
  • synonyms: John Major, John R. Major, John Roy Major
• A university student who is studying a particular field as the principal subject.
  • usage: "she is a linguistics major"
• The principal field of study of a student at a university.
  • usage: "her major is linguistics"

verb

• Have as one's principal field of study.
  • usage: "She is majoring in linguistics"

adjective

• Of greater importance or stature or rank.
  • usage: "a major artist"; "a major role"; "major highways"
• Greater in scope or effect.
  • usage: "a major contribution"; "a major improvement"; "a major break with tradition"; "a major misunderstanding"
• Greater in number or size or amount.
  • usage: "a major portion (a majority) of the population"; "Ursa Major"; "a major portion of the winnings"
• Of the field of academic study in which one concentrates or specializes.
  • usage: "his major field was mathematics"
• Of a scale or mode.
  • usage: "major scales"; "the key of D major"
• Of greater seriousness or danger.
  • usage: "a major earthquake"; "a major hurricane"; "a major illness"
• Of full legal age.
• Of the elder of two boys with the same family name.
  • usage: "Jones major"