Source : Webster's Revised Unabridged Dictionary (1913)

Blindly \Blind"ly\, adv.
   Without sight, discernment, or understanding; without
   thought, investigation, knowledge, or purpose of one's own.

         By his imperious mistress blindly led.   --Dryden.

Source : WordNet®

blindly
     adv 1: without seeing or looking; "he felt around his desk blindly"
     2: without preparation or reflection; without a rational basis;
        "they bought the car blindly"; "he picked a wife blindly"