Learner's definition of REPETITION
1 [noncount] : the act of saying or doing something again : the act of repeating something
Sometimes repetition is necessary to drive a point home.
Find a synonym for “nice” in order to avoid repetition. [=using the same word again]
Children's songs involve lots of repetition.
I quit my job at the factory because I hated the mindless repetition.
2 [count] : something that is done or said again
the poem's rhythmic repetitions
Let's determine what caused the error in order to avoid a repetition (of it).
When he does push-ups, he does 3 sets of 12 repetitions. [=(informal) reps]