Godan verb with 'ru' ending, Intransitive verb
to be shut; to close; to be closed
esp. 閉まる
あいにく店は閉まっていた。Unfortunately, the store was closed. to be firm (of a body, face, etc.); to be well-knit
to be locked
to tighten; to be tightened
to become sober; to become tense
Also written 締まる【しまる】、緊まる【しまる】