Unsupported titles/Number sign

See also: Appendix:Variations of the number sign

also &num;

#	U+0023, # NUMBER SIGN

← "
[U+0022]

Basic Latin

$ →
[U+0024]

﹟	U+FE5F, ﹟ SMALL NUMBER SIGN

← ﹞
[U+FE5E]

Small Form Variants

﹠ →
[U+FE60]

＃	U+FF03, ＃ FULLWIDTH NUMBER SIGN

← ＂
[U+FF02]

Halfwidth and Fullwidth Forms

＄ →
[U+FF04]

Translingual

A # used on a telephone keypad

# (English symbol name number sign or hash or pound sign or octothorpe)

(cartography) Used to denote a village.
(chess notation) Checkmate.
Synonym: ++
(computing) The hash character.
(medicine) A fracture.
(Internet) A hashtag, which is a metadata tag for use in microblogging and social network services, used to label and search content.
(Usenet) Used to pad the left side of a quotation from a manual or official source.
(mathematics, computer science) Concatenation.
(mathematics) Apartness, a binary relation such that if a#b, then any other element c is apart from at least one of a,b. See apartness relation.
(set theory) The cardinality of a set.
${\\displaystyle \\#\\{5,3,7,11\\}=4}$
Synonyms: card, | |
(phonology) Used to indicate a word boundary.
(linguistics) Used to indicate that a sentence is grammatical but semantically strange.
#Jane is a great hostess and John is too.
#I slept a wink last night.
Alternative form of ‡.
Alternative form of ⌗ (“key available on telephone keypads”).
(music) Alternative form of ♯ (“sharp”).

(to pad a quotation on Usenet): > (for a quotation not necessarily from a manual or official source)

The symbol # derives from the abbreviation lb for Latin libra (“pound”), via the medieval convention of indicating abbreviations with a bar, ℔.

# (plural # or #s)

(food packaging, US) Pound (unit of weight).
3# — "three pounds"
(attributive, precedes a numeral, chiefly Canada, US) Number.
#3 — "number three"
Synonym: no.
(Internet slang, text messaging) Number.
- 1997 June 17, RYankowski [username], “Why collect new U.S.?”, in rec.collecting.stamps, Usenet‎:
  I have collected U.S. Stamps since I was a boy back in the 1950's. At that time there was a low # being printed and it was affordable.
(linguistics) Denotes a word or morpheme boundary.

Likely from English.

#

(Mainland China) Alternative form of 號／号 (hào, “number”), used after a numeral.