four-poster adjective 1noun 1forms 1 adjective[before a noun]1 •Having four vertical columns, one in each corner, that support a tester, so that curtains can be hung to exclude draughts from the sleeper.The furnishing of this Blue Room was solid and Victorian, it having been the GHQ of my Uncle Tom's late father, who liked things substantial. There was a four-poster bed, [...] — 1960 noun1 •A four-poster bed, which has four high posts, one at each corner, supporting a canopy.... the bed, an immense four-poster with different rosewood fruits carved crudely on its high headboard, was suffocatingly soft and his body had sunk deep in its feathery center. — 1948 formsfour-posters