As an adjective:
* "She's a major contributor to the project." (meaning significant or important)
* "The team faced a major setback." (meaning significant or important)
* "He's a major league baseball player." (referring to a professional league)
* "My major in college was English." (referring to a field of study)
As a noun:
* "What is your major?" (referring to a field of study)
* "He's a music major." (referring to a person studying music)
* "The company is a major player in the industry." (referring to a significant company)
As a verb:
* "The earthquake majored the city." (meaning to damage something significantly)
The specific meaning of "major" will depend on the context of the sentence.