[shut-in] n (1903) 1: an invalid confined to home, a room, or bed
2: a narrow gorge-shaped part of an otherwise wide valley
3: available oil or gas which is not being produced from an existing well
[2]shut-in adj (1909) 1: confined to one's home or an institution by illness or incapacity
2. a: secretive, brooding "a bitter, ~ face --Claudia Cassidy" b: tending to avoid social contact: withdrawn "the ~ personality type --S. K. Weinberg"