Dictionary
pound' sign"
1. a symbol (£) for “pound” or “pounds” as a monetary unit of the United Kingdom.
2. a symbol (#) for “pound” or “pounds” as a unit of weight or mass:
20# bond paper stock. Cf.
hash mark, number sign, space mark. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.