The symbol # is known as the number sign, [1] hash, [2] and (in North America) the pound sign[3] and has a variety of other names. The symbol has historically been used for a wide range of purposes …

number sign, versatile symbol (#) most commonly used to preface numbers (e.g., apartment #1) but which encompasses a variety of other uses, especially to tag (or hashtag) posts and messages on …

The numero sign or numero symbol, № (also represented as Nº, No̱, No., or no.), [1][2] is a typographic abbreviation of the word number (s) indicating ordinal numeration, especially in names and titles.

Because № isn’t on a standard English keyboard, you usually insert it from a symbol tool (or use a Word shortcut). Click any symbol to copy it. (№ is different from No., #, and N°.) Just type N + o + . Not the …

The number sign is the formal name for the symbol # in typography and standards such as Unicode, where it is officially designated U+0023 NUMBER SIGN (pronounced /ˈnʌmbər saɪn/) and used to …

Dec 17, 2025 · The number sign is the formal name for the symbol # in Unicode and typography standards. That name matters because it separates the symbol from its many informal aliases.

The word hashtag, used to refer to the symbol (#) in Twitter, is a combination of the word hash from hash mark and the word tag, a way to mark something as belonging to a specific category.

The number sign (#) is a typographical symbol that represents the word “number” in American English and in Canada. Generally placed immediately before a number or series of digits (with no spaces), it …

The standard notation for this class uses the number sign symbol, not the sharp sign from music, but it is pronounced "sharp P". More generally, the number sign may be used to denote the class of counting …

Number sign is a name for the symbol #, which is used for a variety of purposes, including the designation of a number (for example, "#1" stands for "number one").