pound sign
US /ˈpaʊnd saɪn/
UK /ˈpaʊnd saɪn/

1.
井号, 磅号
the symbol #, used for various purposes, such as indicating a number, a hashtag, or a telephone key
:
•
Press the pound sign to confirm your selection.
按井号键确认您的选择。
•
Use the pound sign to create a hashtag on social media.
在社交媒体上使用井号创建话题标签。