The Collaborative International Dictionary of English v.0.48:
homebound \home"bound`\, home-bound \home"-bound`\, a. Kept at home, usually due to illness; same as housebound. Syn: housebound, shut-in. [1913 Webster]WordNet (r) 3.0 (2006):
homebound adj 1: confined usually by illness [syn: homebound, housebound, shut-in] n 1: people who are confined to their homes