minor in

: inferior in importance, size, or degree : comparatively unimportant

: not having reached majority (see majority 2)

: having half steps between the second and third, the fifth and sixth, and sometimes the seventh and eighth degrees

: a person who is not yet old enough to have the rights of an adult

: a minor musical interval, scale, key, or mode

: a minor academic subject

: to take courses in a minor subject