lock out
Intermediate (B1)neutral
To stop someone from getting inside somewhere by locking the entrance.
"I locked myself out of the flat and had to call a locksmith."
Hear it in context

Chest Compressions World-Record!!!
Doctor Mike · 0:38
LOCK OUT THOSE ELBOWS.

Chest Compressions World-Record!!!
Doctor Mike · 0:39
LOCK OUT THOSE ELBOWS.

N3on Takes a Private Jet to Vegas w/ Arman Tsarukyan & Nina Drama!
N3ON · 41:44
Lock out of heaven.

Why Chris Bumstead NOW Trains Like An Athlete and you should too!
Garage Strength · 5:01
No lock out there.

Here’s How China SPIES on the US
Ben Shapiro · 27:16
Banks try to lock out small businesses.