major in (something)

major in (something)

To complete a college or university degree with a particular subject as its focus. Originally I thought I would major in English literature, but I switch to psychology in my second year. Samantha's majoring in economics, with a minor in history.
See also: major
Farlex Dictionary of Idioms.

major in something

to specialize in a certain subject in college. I majored in history in college. I want to major in math.
See also: major
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

major in

v.
To complete a long-term course of study in some subject that is one's main focus: In high school I was interested in math, but in college I majored in history.
See also: major
The American Heritage® Dictionary of Phrasal Verbs.
See also:
  • major
  • major in
  • switch on
  • switched on
  • switch off
  • make good money
  • tell you the truth
  • (if the) truth be told
  • if truth be known/told
  • (if the) truth be known