An English and Scottish habitational surname from Old English, from Old English drȳġe (“dry”) + denu (“valley”). / A city in Ontario, Canada; named for Canadian farmer and politician John Dryden.

plural of IFA

(economics) A decrease in the value of a capital asset / (business, finance) An amount by which the proceeds of the sale of a capital asset by its owner are less than its cost to the owner.

A surname.