Dictionary

A person who is below the age of majority, consent, criminal responsibility or other adult responsibilities and accountabilities.

Example: It is illegal to sell weapons to minors under the age of eighteen.

A subject area of secondary concentration of a student at a college or university, or the student who has chosen such a secondary concentration.

Example: I became an English minor.

Determinant of a square submatrix

(British slang) A younger brother (especially at a public school).

To choose or have an area of secondary concentration as a student in a college or university.

Example: I had so many credit hours of English, I decided to minor in it.

Of little significance or importance.

Example: The physical appearance of a candidate is a minor factor in recruitment.

Of a scale which has lowered scale degrees three, six, and seven relative to major, but with the sixth and seventh not always lowered

Example: a minor scale

Being the smaller of the two intervals denoted by the same ordinal number