major

noun1 of 2

important, serious, or large in scope

• “I need to do a major clean of my kitchen.”Tatoeba
• “The manager has put him back in the major league.”Tatoeba

Sentences from Tatoeba show real usage. A word can have several meanings, so a sentence may use another one.

verb2 of 2

To concentrate on a particular area of study as a student in a college or university