EN pound sign
volume_up
{noun}

1. general

pound sign (also: hashtag, ink pad, pincushion, pound)
Google Mail doesn't recognize special search characters like square brackets, parentheses, currency symbols, the ampersand, the pound sign, and asterisks.
Google Mail no reconoce caracteres especiales de búsqueda, como los corchetes, los paréntesis, los símbolos monetarios, el símbolo de almohadilla, el símbolo libra ni los asteriscos.

2. "for pound sterling", British English

3. IT, American English

pound sign (also: hash key, number sign)
pound sign (also: hash key, number sign)

Synonyms (English) for "pound sign":

pound sign
English