Source : Webster's Revised Unabridged Dictionary (1913)

Methinks \Me*thinks"\, v. impers. [imp. {Methought}.] [AS.
   [thorn]yncan to seem, m[=e] [thorn]ynce[eth], m[=e]
   [thorn][=u]hte, OE. me thinketh, me thoughte; akin to G.
   d["u]nken to seem, denken to think, and E. think. See {Me},
   and {Think}.]
   It seems to me; I think. See {Me}. [R., except in poetry.]

         In all ages poets have been had in special reputation,
         and, methinks, not without great cause.  --Spenser.