The Collaborative International Dictionary of English v.0.48:
One \One\, n.
1. A single unit; as, one is the base of all numbers.
2. A symbol representing a unit, as 1, or i.
3. A single person or thing. "The shining ones." --Bunyan.
"Hence, with your little ones." --Shak.
He will hate the one, and love the other. --Matt.
That we may sit, one on thy right hand, and the
other on thy left hand, in thy glory. --Mark x. 37.
After one, after one fashion; alike. [Obs.] --Chaucer.
At one, in agreement or concord. See At one, in the
Ever in one, continually; perpetually; always. [Obs.]
In one, in union; in a single whole.
One and one, One by one, singly; one at a time; one after
another. "Raising one by one the suppliant crew."
one on one contesting an opponent individually; -- in a
go one on one, to contest one opponent by oneself; -- in a
game, esp. basketball.
[1913 Webster +PJC]