The Collaborative International Dictionary of English v.0.48:

Fully \Ful"ly\, adv.
   In a full manner or degree; completely; entirely; without
   lack or defect; adequately; satisfactorily; as, to be fully
   persuaded of the truth of a proposition.
   [1913 Webster]

   Fully committed (Law), committed to prison for trial, in
      distinction from being detained for examination.

   Syn: Completely; entirely; maturely; plentifully; abundantly;
        plenteously; copiously; largely; amply; sufficiently;
        clearly; distinctly; perfectly.
        [1913 Webster]

WordNet (r) 3.0 (2006):

fully
    adv 1: to the greatest degree or extent; completely or entirely;
           (`full' in this sense is used as a combining form);
           "fully grown"; "he didn't fully understand"; "knew full
           well"; "full-grown"; "full-fledged" [syn: fully, to
           the full, full]
    2: sufficiently; more than adequately; "the evidence amply (or
       fully) confirms our suspicions"; "they were fully (or amply)
       fed" [syn: amply, fully] [ant: meagerly, meagrely,
       slenderly, sparingly]
    3: referring to a quantity; "the amount was paid in full" [syn:
       in full, fully]

Moby Thesaurus II by Grady Ward, 1.0:

77 Moby Thesaurus words for "fully":
   absolutely, abundantly, affluently, altogether, aplenty, at length,
   bottomlessly, bounteously, bountifully, completely,
   comprehensively, copiously, diffusely, effusely, entirely,
   exhaustively, extravagantly, exuberantly, faultlessly, flawlessly,
   generously, globally, hundred per cent, ideally, immaculately,
   impeccably, in abundance, in detail, in extenso, in full,
   in full measure, in good supply, in particular, in plenty,
   in quantity, in toto, inclusively, inexhaustibly, infallibly,
   inside out, integrally, just right, largely, lavishly, liberally,
   maximally, minutely, no end, one and all, opulently, outright,
   overflowingly, particularly, perfectly, plenteously, plentifully,
   plumb, prodigally, profusely, purely, quite, richly, riotously,
   roundly, specifically, spotlessly, superabundantly, thoroughly,
   through-and-through, to the full, to the hilt, totally,
   tout a fait, unconditionally, unreservedly, utterly, wholly