Definition of # in English:

#

Line breaks: #

symbol

1The hash sign, used:
1.1As a symbol on a phone keypad or computer keyboard.
1.2Before a numeral that is a number in a series: you’re breaking Rule #1
1.3To represent a pound as a unit of weight or mass.

Usage

See hash3 (usage)

Definition of # in:

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Word of the day impudicity
Pronunciation: ˌɪmpjʊˈdɪsɪti
noun
lack of modesty