Source : Webster's Revised Unabridged Dictionary (1913)

Fain \Fain\, v. t. & i.
   To be glad; to wish or desire. [Obs.]

         Whoso fair thing does fain to see.       --Spencer.

Fain \Fain\, a. [OE. fain, fagen, AS. f[ae]gen; akin to OS.
   fagan, Icel. faginn glad; AS. f[ae]gnian to rejoice, OS.
   fagan[=o]n, Icel. fagna, Goth. fagin[=o]n, cf. Goth.
   fah[=e]ds joy; and fr. the same root as E. fair. Srr {Fair},
   a., and cf. {Fawn} to court favor.]
   1. Well-pleased; glad; apt; wont; fond; inclined.

            Men and birds are fain of climbing high. --Shak.

            To a busy man, temptation is fainto climb up
            together with his business.           --Jer. Taylor.

   2. Satisfied; contented; also, constrained. --Shak.

            The learned Castalio was fain to make trechers at
            Basle to keep himself from starving.  --Locke.

Fain \Fain\, adv.
   With joy; gladly; -- with wold.

         He would fain have filled his belly with the husks that
         the swine did eat.                       --Luke xv. 16.

         Fain Would I woo her, yet I dare not.    --Shak.

Source : WordNet®

fain
     adv : in a willing manner; "this was gladly agreed to"; "I would
           fain do it" [syn: {gladly}, {lief}]

fain
     adj : having made preparations; "prepared to take risks" [syn: {disposed(p)},
            {inclined(p)}, {prepared}]