A different person or thing.
The opposite one.
Otherwise.
Not the same.
Second; noting the remaining one of two things; contrary; alternate.
First one and then the other, and so on. – The Wonder Island Boys: Exploring the Island by Roger Thompson Finlay
And the other is dead. – The Black Robe by Wilkie Collins
Then I shall go on with the other. – The Passenger from Calais by Arthur Griffiths