lock down
Intermediate (B1)neutral
To put a place under tight control so people cannot freely enter or leave.
"The authorities locked down the city centre after the bomb threat was called in."
Hear it in context

Playing All of PRAGMATA!
CDawgVODs · 82:42
Lock down disengaged.

Resident Evil Requiem - The Livestream of the Inevitable Secret Underground Umbrella Lab
Many A True Nerd · 105:06
Pod lock down unavailable.

"This could be life-changing for our game" 😲 Scott Boras' Skubal news is turning heads | BBTN Pod
ESPN MLB · 17:17
fine, but you want lock down eighth and lock down ninth.

I Completed Pragmata...
ConnorDawg · 16:55
Emergency lock down for all.

I Completed Pragmata...
ConnorDawg · 59:07
What's this lock down?