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

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

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.

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.

4. (Mus.) Difference in pitch between any two tones.

{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.

\In"ter*val\, Intervale \In"ter*vale\, n.
A tract of low ground between hills, or along the banks of a
stream, usually alluvial land, enriched by the overflowings
of the river, or by fertilizing deposits of earth from the
adjacent hills. Cf. {Bottom}, n., 7. [Local, U. S.]

      The woody intervale just beyond the marshy land. --The
                                               Century.