The Collaborative International Dictionary of English v.0.48:

Barely \Bare"ly\, adv.
   1. Without covering; nakedly.
      [1913 Webster]

   2. Without concealment or disguise.
      [1913 Webster]

   3. Merely; only.
      [1913 Webster]

            R. For now his son is duke.
            W. Barely in title, not in revenue.   --Shak.
      [1913 Webster]

   4. But just; without any excess; with nothing to spare (of
      quantity, time, etc.); hence, scarcely; hardly; as, there
      was barely enough for all; he barely escaped.
      [1913 Webster]

WordNet (r) 3.0 (2006):

barely
    adv 1: only a very short time before; "they could barely hear
           the speaker"; "we hardly knew them"; "just missed being
           hit"; "had scarcely rung the bell when the door flew
           open"; "would have scarce arrived before she would have
           found some excuse to leave"- W.B.Yeats [syn: barely,
           hardly, just, scarcely, scarce]
    2: in a sparse or scanty way; "a barely furnished room" [syn:
       scantily, barely]

Moby Thesaurus II by Grady Ward, 1.0:

46 Moby Thesaurus words for "barely":
   a bit, a little, alone, baldly, by a hair, by an ace, closely,
   ever so little, exclusively, exiguously, faintly, feebly, hardly,
   imperfectly, inappreciably, inconsequentially, insignificantly,
   just, just a bit, lightly, little, meagerly, merely, minimally,
   minutely, nakedly, narrowly, nearly, negligibly, not hardly,
   not quite, only, only just, plainly, purely, scantily, scarce,
   scarcely, simply, simply and solely, singly, slightly, solely,
   tant soit peu, triflingly, weakly