[rickp1]

I have a question that I just can't seem to understand the answer to, even after reading and researching.
As obvious from this question I'm new to photography and I have a question regarding the term f stop or just stop. I'm looking for the actual adjustment setting meaning.
When people use the term 1 f stop or 2 f stop, do they mean i click on the wheel, for example from 4.5 to 5 or is it a larger setting?? I hope my question is clear.

Also the term 1 stop or 2 stop when referring to exposure, same thing, does the term mean 1 click or 1 bar in the setting or the full range from 0 to + or -1??

Thanks again.
R