minor

Not of legal age.

“minor children”

Relatively moderate, limited, or small.

Warranting only temporal punishment.

Inferior in number or size or amount.

“a minor share of the profits”

(of a scale or mode) having half steps between the second and third degrees, and (usually) the fifth and sixth degrees, and the seventh and eighth degrees.

“the minor keys”

“in B flat minor”

Of lesser importance or stature or rank.

“a minor poet”

“had a minor part in the play”

Of the younger of two boys with the same family name.

“Jones minor”

Lesser in scope or effect.

“had minor differences”

“a minor disturbance”

Of lesser seriousness or danger.

“suffered only minor injuries”

“some minor flooding”

Of your secondary field of academic concentration or specialization.

A young person of either sex.

Have as one's secondary field of study.

“in collee she minored in mathematics”