The Collaborative International Dictionary of English v.0.48:

Throughout \Through*out"\, prep.
   Quite through; from one extremity to the other of; also,
   every part of; as, to search throughout the house.
   [1913 Webster]

         Nor to their idle orbs doth sight appear
         Of sun, or moon, or star, throughout the year.
                                                  --Milton.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Throughout \Through*out"\, adv.
   In every part; as, the cloth was of a piece throughout.
   [1913 Webster]

WordNet (r) 3.0 (2006):

throughout
    adv 1: from first to last; "the play was excellent end-to-end"
           [syn: throughout, end-to-end]
    2: used to refer to cited works [syn: passim, throughout]