1. (a.) Next in order after the sixth;; coming after six others.

2. (a.) Constituting or being one of seven equal parts into which anything is divided; as, the seventh part.

3. (n.) One next in order after the sixth; one coming after six others.

4. (n.) The quotient of a unit divided by seven; one of seven equal parts into which anything is divided.

5. (n.) An interval embracing seven diatonic degrees of the scale.

6. (n.) A chord which includes the interval of a seventh whether major, minor, or diminished.