Vain repetitions are empty, mechanical, or meaningless forms of speech used in prayer. The expression may refer either to repeated phrases or to lengthy recitation of obscure formulas.
Jesus warned against using vain repetitions in prayer, identifying such speech with heathen custom and “much speaking.” The warning concerns reliance on mechanical or excessive words rather than genuine prayer.
The Greek word occurs only in Matthew 6:7 and has several manuscript spellings. Its precise derivation and whether it means repeated phrases or meaningless formulas cannot be determined with certainty.