Alex Stetsenko

I was always wondering what the difference between “quick” and “fast” is.

And it looks like:

• fast applies to things that move (e.g., “fast horses”, “a fast train”);
• quick means promptness and the taking of little time (e.g., “a quick dinner”, “quick thinking”).

Also there is another interesting example to understand the difference better:

• a quick question means that it does not take lots of time to ask and answer;
• a fast question refers to the talking speed of the enquirer.