Meaning of “foot” - Learner’s Dictionary

foot

noun uk us /fʊt/
BODY PART [ C ] (plural feet)

A1 one of the two flat parts on the ends of your legs that you stand on:

He stepped on my foot.
MEASUREMENT [ C ] (plural foot, feet) (written abbreviation ft)

B1 a unit for measuring length, equal to 0.3048 metres or 12 inches:

Alex is about 6 feet tall.
an eight foot high wall
the foot of sth

the bottom of something such as stairs, a hill, a bed, or a page:

Put the notes at the foot of the page.
on foot

A2 If you go somewhere on foot, you walk there.

be on your feet

to be standing and not sitting:

I'm exhausted, I've been on my feet all day.
put your feet up

to relax, especially by sitting with your feet supported above the ground:

You put your feet up for half an hour before the kids get home.
set foot in/on sth

to go into a place or onto a piece of land:

He told me never to set foot in his house again.
get/rise to your feet

to stand up after you have been sitting:

(Definition of “foot noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)