Augmented interval

Interval In"ter*val, n. [L. intervallum; inter between + vallum a wall: cf. F. intervalle. See {Wall}.] [1913 Webster] 1. A space between things; a void space intervening between any two objects; as, an interval between two houses or hills. [1913 Webster]

'Twixt host and host but narrow space was left, A dreadful interval. --Milton. [1913 Webster]

2. Space of time between any two points or events; as, the interval between the death of Charles I. of England, and the accession of Charles II. [1913 Webster]

3. A brief space of time between the recurrence of similar conditions or states; as, the interval between paroxysms of pain; intervals of sanity or delirium. [1913 Webster]

4. (Mus.) Difference in pitch between any two tones. [1913 Webster]

{At intervals}, coming or happening with intervals between; now and then. ``And Miriam watch'd and dozed at intervals.'' --Tennyson.

{Augmented interval} (Mus.), an interval increased by half a step or half a tone.