dun

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dun

1. a brownish-grey colour
2. a horse of this colour
3. Angling
a. an immature adult mayfly (the subimago), esp one of the genus Ephemera
b. an artificial fly imitating this or a similar fly

DUN

(DialUp Networking) The dial-up networking capability in Windows 95/98. See Win Dial-up Networking.