1. The habit of frequently repeating favorite words or expressions.
2. The obsessive repetition of meaningless words and phrases.
3. In psychiatry, a manifestation of stereotypy, consisting of the morbid repetition of words, phrases, or sentences; also called cataphasia or autoecholalia.

A patient with the catatonic form of schizophrenia kept repeating “muscle, muscle, muscle,” in reply to all forms of questioning.