Notebook, 1993-



Space between: [points, limits, etc.] . . . . Intervening period of time, interspace, intermission . . . The totality of points between designated end points [math] . . . difference in pitch [in music--sequential or successive intervals]. . . .

R  E  F  E  R  E  N  C  E  S 
Interval n. 1. an intervening period of time: an interval of 50 years. 2. a space between things, points, limits, etc.; interspace: an interval of 10 feet between posts. 3. Brit. an intermission, as between the acts of a play. 4. Math. the totality of points on a line between two designated points or endpoints that may or may not be included. 5. Music. the difference in pitch between two tones, as two sounded simultaneously [harmonic interval] or sounded sucessively [melodic interval]. 6. at intervals, at particular periods of time; now and then: At intervals there were formal receptions at the governor's mansion. [ME intervall(e) < L intervall(um) interval, lit., space between two palisades. See Inter-, Wall] [Urdang, Laurence, ed. Random House Dictionary of The English Language. New York: Random House, 1968.]



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