sinkplug
nounUK /ˈsɪŋkplʌɡ/
US /ˈsɪŋkplʌɡ/
A sinkplug is a small round thing that stops water from going down the drain.
She pulled out the sinkplug so the dirty water could drain away.
OTHER MEANINGS
2. A plug used to seal the drain of a bathtub or basin.
He forgot to put the sinkplug in, so the bathwater ran straight out.
3. Any removable stopper fitted to a waste pipe opening.
The old sinkplug had perished and no longer sealed properly.
4. A small rubber or plastic plug kept near a sink for blocking the drain.
There was a spare sinkplug in the cupboard under the sink.