'Four-poster' definitions:

Definition of 'four-poster'

(from WordNet)
noun
A bed with posts at the four corners that can be used to support a canopy or curtains

Definition of 'Four-poster'

From: GCIDE
  • Four-poster \Four"-post`er\, n. A large bedstead with tall posts at the corners to support a canopy or curtains. [Colloq.] [1913 Webster]