Definition of new broom in English:

new broom

noun

  • A person who or thing which effects fundamental or numerous alterations; especially a newly appointed person who vigorously sets about making changes in personnel, procedures, etc.

Origin

Late 18th century; earliest use found in Frederick Reynolds (1764–1841), playwright. From new + broom, with allusion to the proverb new brooms sweep clean.

Pronunciation

new broom

/ˌnjuː ˈbruːm/