閉鎖|へいさheisa[0]heiban (flat)

1. noun, suru verb, transitive verbclosing; closure
   彼かれらはその学校がっこうの閉鎖へいさについて討論とうろんした。↗

   They debated closing the school.
2. noun, suru verb, transitive verbshutdown; lockout

• Synonym閉じるとじるNeutralShutting or closing something — 「目を閉じる」, 「店を閉じる」. Focuses on the action itself; 「閉鎖」 is about a facility or organization stopping operations.
• Synonym閉めるしめるNeutralAn everyday transitive verb for closing doors and windows — 「窓を閉める」. It is about the routine action, not a facility shutting down.
• Synonym閉塞へいそくWrittenWritten word for blockage or being blocked up — 「腸閉塞」, 「閉塞感」. Highlights a passage being obstructed rather than a place being shut.
• SynonymクローズNeutralLoanword meaning to close or end, as in 「クローズする」. Leans toward business and web contexts, unlike the general 「閉鎖」.
• Synonym封鎖ふうさWrittenWritten word for forcibly sealing something off — 「道路封鎖」, blockading roads or ports. 「閉鎖」 is closing down; 「封鎖」 is cutting access.
• Synonym閉ざすとざすWrittenWritten transitive verb: to close or block an entrance — 「門を閉ざす」; the passive 「雪に閉ざされる」 means being shut in by heavy snow.
• Related閉ざすとざすWrittenWritten transitive verb: to close or block an entrance — 「門を閉ざす」; the passive 「雪に閉ざされる」 means being shut in by heavy snow.
• Related封じるふうじるWrittenWritten verb for sealing something shut or forcibly stopping it — 「口を封じる」, to seal someone's mouth. Emphasis on forcible prevention.
• Related塞ぐふさぐNeutralTo plug or block up an opening — 「穴を塞ぐ」. The image is filling a hole or gap, not a facility or organization shutting down.
• Related閉会へいかいNeutralThe closing of a meeting or conference — bringing an event to an end. Narrower than 「閉鎖」, which covers facilities and organizations.
• Related閉幕へいまくWrittenWritten word for the curtain falling on a play or large event. Suits big occasions; 「閉鎖」 means shutting down a place or group.
• Related閉店へいてんNeutralA shop closing for the day or going out of business — 「閉店セール」. Used only of shops; 「閉鎖」 extends to factories and organizations.
• Related遮断しゃだんWrittenWritten word for cutting off a flow — 「光を遮断する」; also traffic, power, communications. About severing connections, not closing down.
• Related閉館へいかんNeutralA library, museum or the like closing for the day or permanently — 「閉館時間」. Only for such venues; 「閉鎖」 applies much more widely.
• Related閉まるしまるNeutralIntransitive everyday verb: a door or window closes, as in 「ドアが閉まる」; 「閉鎖」 is the formal noun for a facility shutting down or being sealed off.
• Related閉山へいざんWrittenWritten word for closing a mountain to climbers or shutting down a mine. Tied to mountains; 「閉鎖」 is the general term.
• Related閉扉へいひWrittenWritten term for the closing of a door or gate, rarely seen in modern Japanese; everyday door closing is 「閉める」, while 「閉鎖」 means shutting down or sealing off.
• Antonym開放かいほうNeutralThe antonym: opening a door or window, or opening a place up to the public. Directly opposed to the closing and sealing of 「閉鎖」.

Use 「閉鎖」 for a facility or organization closing down or being sealed off — 「工場閉鎖」, or a closed society as in 「閉鎖的な社会」. For everyday door and window closing say 「閉める」; for a shop, 「閉店」; for blockading a road or port, 「封鎖」. 「閉じる」 and 「塞ぐ」 cover closing and plugging things; 「閉まる」 is the intransitive counterpart. Event endings take 「閉会」 or 「閉幕」, venues take 「閉館」. 「閉ざす」 and 「遮断」 are written words for shutting in and cutting off. The opposite of 「閉鎖」 is 「開放」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 出入でいり口くちなどを閉とじること。
2. 組織そしきなどが活動かつどうや仕事しごと、機能きのうを停止ていしすること。閉とざすこと。
3. ウェブサイト（ホームページ）やコンテンツの公開こうかいをやめる（外部がいぶからのアクセスをできなくなるようにする）こと。
4. 内うちにこもって外そとからの立ち入たちいりを許ゆるさないこと。