major in
verb- To take (something) as one's major field of study in an institute of tertiary education (such as a college or university). · John majored in Computer Science, while Jane majored in Art.· I majored in education with a concentration in theater.
From the library
“Ex-major in the Austrian service?”
Learn major in in real texts
With a free account, hover any word in the library for its meaning, hear it read aloud, save words for review timed to your memory, and see how much of each book you already know.