The Collaborative International Dictionary of English v.0.48:

Distinctly \Dis*tinct"ly\, adv.
   1. With distinctness; not confusedly; without the blending of
      one part or thing another; clearly; plainly; as, to see
      distinctly.
      [1913 Webster]

   2. With meaning; significantly. [Obs.]
      [1913 Webster]

            Thou dost snore distinctly;
            There's meaning in thy snores.        --Shak.

   Syn: Separately; clearly; plainly; obviously.
        [1913 Webster]

WordNet (r) 3.0 (2006):

distinctly
    adv 1: clear to the mind; with distinct mental discernment;
           "it's distinctly possible"; "I could clearly see myself
           in his situation" [syn: distinctly, clearly]
    2: in a distinct and distinguishable manner; "the subtleties of
       this distinctly British occasion"
    3: to a distinct degree; "urbanization in Spain is distinctly
       correlated with a fall in reproductive rate"

Moby Thesaurus II by Grady Ward, 1.0:

89 Moby Thesaurus words for "distinctly":
   absolutely, aloud, and no mistake, apparently, apprehensibly,
   articulately, assuredly, at all events, at any rate, audibly,
   by all means, certainly, clearly, coherently, comprehensibly,
   concretely, conspicuously, decidedly, decisively, definitely,
   discernibly, especially, evidently, exactly, explicitly, expressly,
   for a certainty, for a fact, for certain, for sure, forsooth,
   glaringly, in detail, in particular, in plain English,
   in plain terms, in plain words, in truth, indeed, indeedy,
   intelligibly, item by item, limpidly, lucidly, manifestly,
   markedly, minutely, most assuredly, most certainly,
   nothing else but, noticeably, observably, obviously, of course,
   out, out loud, palpably, particularly, patently, pellucidly,
   perceivably, perceptibly, perspicuously, plainly, positively,
   precisely, prominently, pronouncedly, recognizably, seeably,
   separately, simply, singly, specially, specifically, staringly,
   starkly, surely, to a certainty, to be specific, truly,
   unambiguously, unconcealedly, understandably, undisguisedly,
   unequivocally, unmistakably, visibly, with clarity