戸締まり (tojimari) means “locking the doors”

More examples

旅行に出る前に戸締まりをします。ryo kō ni de ru mae ni to ji ma ri o shi ma su

I lock the doors before leaving for a trip.

Centers on making a building's openings secure so that unwanted entry is prevented.

施錠sejō: The act of securing an opening by locking it with a key or another locking device.

戸や窓などを閉めて鍵をかけ、外部から入れないようにすること。to ya mado na do o shi me te kagi o ka ke gai bu ka ra i re na i yō ni su ru ko to

戸締まり (tojimari, "locking up") combines 戸 (to, "door") with 締まり (shimari, "secure closure"), the noun form of 締まる (shimaru, "become tight or secure").

In Japanese safety reminders, 戸締まり (tojimari) often includes checking doors and windows before going out or going to bed, not just turning a key in one door.