easten sean.Scottish (Shetland) (in Sandness) a heavy sea driven against the coast from the north-east.
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2010 G. P. S. PetersonLet. 6 Apr. (O.E.D. Archive) In the village of Sandness, on the mainland opposite the island of Papa Stour, people call it [sc. the heavy sea] ‘Da aesteen sea’, as it affects the east side of Sandness.