The Collaborative International Dictionary of English v.0.48:

Fey \Fey\ (f[=a]), a. [AS. f[=ae]ga, Icel. feigr, OHG. feigi.]
   Fated; doomed. [Old Eng. & Scot.]
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fey \Fey\ (f[=a]), n. [See Fay faith.]
   Faith. [Obs.] --Chaucer.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fey \Fey\, v. t. [Cf. Feague.]
   To cleanse; to clean out. [Obs.] --Tusser.
   [1913 Webster]

WordNet (r) 3.0 (2006):

fey
    adj 1: slightly insane [syn: fey, touched(p)]
    2: suggestive of an elf in strangeness and otherworldliness;
       "thunderbolts quivered with elfin flares of heat lightning";
       "the fey quality was there, the ability to see the moon at
       midday"- John Mason Brown [syn: elfin, fey]