Swilly, Lough, a narrow inlet of the Atlantic, on the coast of Donegal, North Ireland, running in between Dunaff Head (E.) and Fanad Point (W.), a distance of 25 m.; is from 3 to 4 m. broad; the entrance is fortified.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Swift, Jonathan * Swinburne, Algernon Charles