1. noun /ˈstɒp.ə,ˈstɔp.ə,ˈstɑ.pɚ/
a) Agent noun of stop, someone or something that stops something.
Put a stopper in the knot.
We need a stopper or the boat will sink.
2. verb /ˈstɒp.ə,ˈstɔp.ə,ˈstɑ.pɚ/
To close by using a stopper
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