What is the meaning of ?

Demarcates parenthetical thought. See — —.

Indicates a logical consequence.

Indicates aposiopesis, an abrupt breaking-off in speech. See also (the ellipsis).

Separates a term from its definition.

Indicates a lack of data in a table.

Alternative form of (horizontal bar; quotation dash; introduces a line of dialogue)

Used to censor letters in obscene words.

Used to replace part or all of a person's name, a place name, a date, or so forth.

Used as a ditto mark in lists or tables to indicate a repetition of appropriate content above.

A pointing mark in Anglican chant, used as a placeholder in the text to indicate that a bar of the chant should be omitted; typically used when a verse or half-verse is very short.

Abbreviation of the.

The letter sequence th.

The sound sequences /(V)nd/, /(V)nt/

The suffixes or sequences mand, mend, mond, and -ment.

Indicates zero (omission) of the present tense of быть (bytʹ).

Used in — —.

Replaces in some appositions, where hyphen would be used to connect the appositive word and the word in apposition if neither of them were a phrase.

is not used when the subject is a pronoun; e.g. я ру́сский (ja rússkij, I am Russian) or with predicative adjectives.

— — is preferred over parentheses when the supplemental information is necessary to understand the writer's point and cannot be dropped.

A dash or a hyphen is used in Russian apposition when the first word (or first words) is not a form of address (e.g. товарищ (tovarišč)) and the second word is an appellative.

Source: wiktionary.org