What is the meaning of -?

The hyphen-minus, a catch-all symbol for certain dash and dash-like characters.

1. ‐ (hyphen)
2. − (minus sign)
3. ‒ (figure dash)
4. – (en dash)
5. — (em dash)
6. ― (horizontal bar)
7. skip

   ‐ (hyphen)

   − (minus sign)

   ‒ (figure dash)

   – (en dash)

   — (em dash)

   ― (horizontal bar)

   skip

   A single bond.

   A long signal, used to form Morse code text, together with . (a short signal).

   Visual rendering of Morse code for T. (Latin)

   Visual rendering of Morse code for Т. (Cyrillic)

   Delimits parts of compound words

   1. when a part ends in the same vowel the next part starts with.

      when a part ends in the same vowel the next part starts with.

      when the former part ends in a vowel and the next part starts with a vowel, to avoid ambiguity or to help readability.

      when a part ends in a consonant and the next part starts with a vowel, to avoid ambiguity or to help readability.

      in certain dvandva or coordinative compounds where the parts are considered 'equal'.

      when at least one of the two parts

      1. contains a space (a space is written before the hyphen if the previous part contains a space, and vice versa, but not both).

         contains a space (a space is written before the hyphen if the previous part contains a space, and vice versa, but not both).

         is a proper noun in the nominative case (unless it has been assimilated to the point it is no longer capitalized), chiefly in words that are not themselves proper nouns.

         is a proper noun in the genitive case (unless it has been assimilated to the point it is no longer capitalized), for clarity and to avoid ambiguity.

         is an abbreviation, acronym or initialism (optional if it is the final component and spelled in lowercase).

         is a letter, number or symbol.

         is a particle or a word treated as such.

         is an unadapted loanword.

         Represents omission of repeated parts of compound words in a list ("suspended hyphen").

         Used for hyphenation or splitting words across lines.

         Visual rendering of Morse code for Τ.

         Visual rendering of Morse code for ת.

         A romanization of the ー (long vowel mark).

         Visual rendering of Morse code for ム.

         Used to separate elements of a compound word when the second begins with an orthographic vowel (phonemic glottal stop).

         long vowel mark

         Replaces the party designation of an independent politician.

         Represents omission of repeated parts of compound words in a list.

         Used for hyphenation or splitting words across lines.

         Visual rendering of Morse code for ฏ.

         Visual rendering of Morse code for ต.

         Source: wiktionary.org