The Collaborative International Dictionary of English v.0.48:
daybed \daybed\ n. 1. an armless couch; a seat by day and a bed by night. Syn: divan bed. [WordNet 1.5] 2. a long chair; for reclining. Syn: chaise longue, chaise. [WordNet 1.5]WordNet (r) 3.0 (2006):
daybed n 1: an armless couch; a seat by day and a bed by night [syn: daybed, divan bed] 2: a long chair; for reclining [syn: chaise longue, chaise, daybed]