What is the meaning of -'s?

Possessive marker, indicating that an object belongs to the noun or noun phrase bearing the marker.

In the absence of a specified object, used to indicate “the house/place/establishment of”.

Indicates a purpose or a user.

Used to indicate a quantity of something, especially of time.

Used to indicate various other kinds of relationship, such as source or origin, object of an action, subject depicted, etc.

Attached to a noun or noun phrase linked to a genitive of, forming a double genitive.

Used to form the plurals of numerals, letters, some abbreviations and some nouns, usually because the omission of an apostrophe would make the meaning unclear or ambiguous.

Used to form plurals of foreign words, to clarify pronunciation, such as “banana’s” or “pasta’s”.

Used to form the plural of nouns that correctly take just an "s" in the plural. See greengrocer’s apostrophe.

Contraction of is.

Alternative form of -s, used when a word ends in a long vowel that would turn short if suffixed without the apostrophe

  1. forming plurals

    forming plurals

    forming the genitive

    Used to form the genitive of proper names

    Used to form the genitive of proper names under certain circumstances.

    contracted form of das

    contracted form of das

    contracted form of es

    contracted form of ist

    Contraction of es.

    Source: wiktionary.org