What does fast mean?
fast
Definition
Moving or working at a high speed, so that it gets somewhere or does its job in very little time.
Example sentences
I brought an electric kettle back from England — it's so much faster than heating water on the stove.
The microwave is fast, but the middle of the lasagne always comes out frozen.
The microwave is fast, but the middle of the lasagne always comes out frozen.
This train is fast.