Forms of other are used as either adjectives or pronouns:

Note that a final -s is used only for a plural pronoun (others). Another means one more in addition to the one(s) already mentioned. Other/others (without the) refer to several more in addition to the one(s) already mentioned. The other(s) has a different meaning (all that remains from a given number or specific group):

–I have three apartments. Two are mine. The other is yours.

Examples of Forms of Other

• I like the one facing the pool. I'll use the other one for my study.
• I lost my hat, so I had to buy another one.