Text style Emoji style #︎ #️ Text style isforced with ⟨︎⟩ and emoji style with ⟨️⟩. also #
A # used on a telephone keypad # (English symbol name number sign or hash or pound sign or octothorpe
( computing ) hash character.( Internet ) hashtag , which is ametadata tag for use inmicroblogging andsocial network services, used tolabel andsearch content.2019 June 27, Lisa Respers France, “Country star Jake Owen claps back at anti-LGBTQ commenter”, inCNN [1] “Some of my closest friends and coworkers, are part of the# lgbt community and I couldn’t be more happy for the progress they have made,” Owen wrote in the caption.
( cartography ) Used to denote avillage . ( chess notation) Used to denotecheckmate . Synonym: ++ ( medicine , shorthand) Used to denote abone fracture . # NOFfractured neck of femur ( mathematics , computer science ) Used to indicate stringconcatenation . 1 # 2 = 12 {\displaystyle 1\#2=12} ( mathematics ) Apartness apartness relation .( mathematics ) Primorial Coordinate term: ! ( “ factorial ” ) 12 # = 2 × 3 × 5 × 7 × 11 = 2310 {\displaystyle 12\#=2\times 3\times 5\times 7\times 11=2310} ( set theory ) cardinality of a set.# { 5 , 3 , 7 , 11 } = 4 {\displaystyle \#\{5,3,7,11\}=4} Synonyms: card | | ( linguistics ) Used to indicate that a sentence isgrammatical butsemantically strange. # Jane is a great hostess and John is too.
# I slept a wink last night.
# Colorless green ideas sleep furiously.
( phonology ) Used to indicate a word boundary. d → t / _# ―/d/ devoices to [t] before a word boundary ( sign language linguistics ) Used to indicate alexicalized sign. ( Usenet ) Used to pad the left side of a quotation from a manual or official source. Coordinate term: > ( programming ) Used to indicate a hexadecimal color code. #00FF00
bright green:
Alternative form of‡ Alternative form of⌗ ( “ key available on telephone keypads ” ) ( music ) Alternative form of♯ ( “ sharp ” ) .Derived from the abbreviationlb Latin libra ( “ pound ” ) , via the medieval convention of indicating abbreviations with a bar,℔
# (plural # or #s
( US ) Pound (unit ofweight ).3# ―threepounds ( attributive , precedes a numeral) Number .Synonym: no. # 3number three( Internet slang , text messaging ) Number .1986 December 14, Ben Robbins, “Operator Denies Request For Gay Phone# ”, inGay Community News , volume14 , number22 , page 2:
1997 June 17, RYankowski[ username] , “Why collect new U.S.?”, inrec.collecting.stamps [2] 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.
( Scrabble ) In English-languageScrabble word list and not the North American list. #
( Mainland China ) alternative form of號 / 号 ( “ number ” ) ,used after a numeral. 
Number sign on Wikipedia.Wikipedia