shut in

Short definition from Wiktionary

Verb

1. 1
   To confine.
2. 2
   To completely surround or enclose.
3. 3
   To settle down, or fall; to arrive; (said of evening, etc.)

Adjective

1. 1
   Confined to a location, as by infirmity or illness.

Noun

1. 1
   A person confined to a location, as by illness or infirmity.
2. 2
   A narrow river gorge confined by resistant rock layers; a type of rock formation in which a stream is confined to a narrow bed of resistant stone.