Definition of petitionist in English:

petitionist

noun

rare
  • A person who makes a practice of petitioning; a professional petitioner.

Origin

Early 19th century; earliest use found in Charles Lamb (1775–1834), essayist. From petition + -ist.

Pronunciation

petitionist

/pɪˈtɪʃənɪst//pɪˈtɪʃ(ə)nɪst/