The term other’s is the singular possessive form of the word other. Therefore, you use it to indicate that either something belongs to the other person or the other object/place. For example, in the following sentence, the word other’s refers to another menu option.

The answer depends on the context. You use other’s when referring to something that belongs to someone else, such as “We are wearing each other’s clothes.” You use others’ when referring to something that belongs to a group of people, such as “The others’ cars are parked over there.”

Other means ‘additional or extra’, or ‘alternative’, or ‘different types of’. We can use other with singular uncountable nouns and with plural nouns: The embassy website has general information about visas.