(intransitive) To utter the interjection oh; to express surprise, etc.

A form of musical notation indicating fingering rather than the pitch of notes, commonly used for stringed instruments.

(military, nautical) A naval officer below the rank of vice admiral, originally in charge of a fleet's rear formation. / (slang) A proctologist.

(mathematics) Any member of a certain group of polynomials remarkable in that the number of crossings of the x-axis in the unit interval does not go up as the degree of the polynomials goes up.