Englishfor English speakers
one
Determinative
—
(ordinal first) The number 1.
We have one nose and one mouth.
one
Noun
—
The number 1.
One is the smallest whole number.
one
Pronoun
—
One is a singular pronoun which means "someone" or "people". It is used more often in formal writing.
It is easy to see the difference if one looks closely enough.
or
Conjunction
—
A word used to link two alternative choices.
Would you like tea or coffee?
both
Determinative
—
one thing and another thing
Jim took both the apple and the orange.
Both Anne and Jane agreed to eat the pear.
Give me one. You can't have both.
Both of my parents were from Canada.
They found problems at both the schools.
The room had windows at both ends.
Working in the city and living in the country, you get the best of both worlds.
There were cars coming from both directions.