shut in verb 4/ˈʃʌtˌɪn/ noun 2/ˈʃʌtˌɪn/ adjective 1forms 3 verb4 •To confine.We need to shut the dog in so he doesn’t escape. •To completely surround or enclose. •To stop pumping oil from a site, ending production. •(old-fashioned) To settle down, or fall; to arrive; (said of evening, etc.)Then there are the golden hues of twilight shadowed in the lake, and the light veil of mist drawing across the foliage of the valley as the evening shuts in upon it. — 1846 shut-in /ˈʃʌtˌɪn/ noun2 •A person confined to a location, as by illness or infirmity.He visited shut-ins as a good deed. •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.A shut-in is a geological feature similar to a gorge that “shuts-in” the river. — 2024 adjective1 •Confined to a location, as by infirmity or illness. formsshutting in · shuts in · shut-ins