doorwatcher

noun
UK /ˈdɔːwɒtʃə/
US /ˈdɔːrwɑːtʃər/

A doorwatcher is someone who keeps an eye on a door.

The doorwatcher sat by the gate all night.


OTHER MEANINGS

2. A person who watches a door to see who comes and goes.

The doorwatcher noted every visitor in a small book.

3. A device that keeps watch over a doorway.

The doorwatcher camera turned on when someone walked up.

4. A pet that stays near the door and watches it.

Our dog is a little doorwatcher who barks at every knock.