An other, another (person, etc), more often rendered as another.
I'm afraid little Robbie does not always play well with others.
The other one; the second of two.
One boat is not better than the other.
To regard, label or treat as an "other", as not part of the same group; to view as different and alien.
To treat as different or separate; segregate; ostracise.
See other (determiner) below
Second.
I get paid every other week.
Alien.
Different.
Left, as opposed to right.
Apart from; in the phrase "other than".
Other than that, I'm fine.
Otherwise.
If you think other. — Shakespeare.