(informal) Of about seventeen years of age.

(rare) A group of seven persons or things.

plural of sevensome

(US, colloquial) A girl's seventeenth birthday, or seventeenth-birthday party. It is often used to mitigate a failed sweet sixteen birthday.

(UK, obsolete, rare) Construed as singular.

(UK, obsolete) The value of seven old pennies.

(rare) The property of being seventeen.

The property of being sevenfold.

(colloquial) Any time close to seven o'clock.

plural of diminished seventh