The Collaborative International Dictionary of English v.0.48:

Just \Just\, adv.
   1. Precisely; exactly; -- in place, time, or degree; neither
      more nor less than is stated.
      [1913 Webster]

            And having just enough, not covet more. --Dryden.
      [1913 Webster]

            The god Pan guided my hand just to the heart of the
            beast.                                --Sir P.
                                                  Sidney.
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            To-night, at Herne's oak, just 'twixt twelve and
            one.                                  --Shak.
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   2. Closely; nearly; almost.
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            Just at the point of death.           --Sir W.
                                                  Temple.
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   3. Barely; merely; scarcely; only; by a very small space or
      time; as, he just missed the train; just too late.
      [1913 Webster]

            A soft Etesian gale
            But just inspired and gently swelled the sail.
                                                  --Dryden.
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   Just now, the least possible time since; a moment ago.
      [1913 Webster]

WordNet (r) 3.0 (2006):

just now
    adv 1: only a moment ago; "he has just arrived"; "the sun just
           now came out" [syn: just, just now]