Definition of "hassock"

hassock

/ˈhasək/

noun
plural hassocks
1. A dense clump of grass or vegetation; a tussock.
2. A cushion used primarily in churches for kneeling on while praying.
  Quotations
  At the next service he found a flower on his hassock and a highly suggestive Catholic bookmarker tucked into his hymn-book.
  1978, Lawrence Durrell, Livia (Avignon Quintet), Faber & Faber, published 1992, page 357
3. A thick cushion used as a seat; an ottoman or pouffe.