The Collaborative International Dictionary of English v.0.48:

Overall \O"ver*all\, adv.
   Everywhere. [Obs.] --Chaucer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

overall
    adj 1: involving only main features; "the overall pattern of his
           life"
    2: including everything; "the overall cost"
    n 1: (usually plural) work clothing consisting of denim trousers
         (usually with a bib and shoulder straps)
    2: a loose protective coverall or smock worn over ordinary
       clothing for dirty work [syn: overall, boilersuit,
       boilers suit]

Moby Thesaurus II by Grady Ward, 1.0:

78 Moby Thesaurus words for "overall":
   accumulative, across-the-board, ad infinitum, all in all, all over,
   all round, all things considered, all-comprehensive, all-embracing,
   all-inclusive, altogether, as a rule, as a whole,
   as an approximation, at all points, at full length, at large,
   blanket, broadly, broadly speaking, by and large, chiefly,
   commonly, compendious, complete, comprehensive, cumulative,
   encyclopedic, entire, every bit, every inch, every whit, general,
   generally, generally speaking, global, head and shoulders,
   heart and soul, in all respects, in every respect, in extenso,
   in general, inclusive, inside and out, mainly, mostly, neck deep,
   normally, omnibus, on all counts, on balance, on the whole,
   ordinarily, over-all, panoramic, predominantly, prevailingly,
   principally, root and branch, roughly, roughly speaking, routinely,
   speaking generally, sweeping, synoptic, through and through,
   throughout, to the brim, to the death, to the end, to the hilt,
   total, universal, usually, whole, without exception,
   without omission, you name it