Source : Webster's Revised Unabridged Dictionary (1913)

Repetition \Rep`e*ti"tion\ (r[e^]p`[-e]-t[i^]sh"[u^]n), n. [L.
   repetitio: cf. F. r['e]p['e]tition. See {Repeat}.]
   1. The act of repeating; a doing or saying again; iteration.

            I need not be barren of accusations; he hath faults,
            with surplus to tire in repetition.   --Shak.

   2. Recital from memory; rehearsal.

   3. (Mus.) The act of repeating, singing, or playing, the same
      piece or part a second time; reiteration of a note.

   4. (Rhet.) Reiteration, or repeating the same word, or the
      same sense in different words, for the purpose of making a
      deeper impression on the audience.

   5. (Astron. & Surv.) The measurement of an angle by
      successive observations with a repeating instrument.

   Syn: Iteration; rehearsal. See {Tautology}.

Source : WordNet®

repetition
     n 1: an event that repeats; "the events today were a repeat of
          yesterday's" [syn: {repeat}]
     2: the act of doing or performing again [syn: {repeating}]
     3: the repeated use of the same word or word pattern as a
        rhetorical device