The Collaborative International Dictionary of English v.0.48:

Onward \On"ward\, a.
   1. Moving in a forward direction; tending toward a
      contemplated or desirable end; forward; as, an onward
      course, progress, etc.
      [1913 Webster]

   2. Advanced in a forward direction or toward an end.
      [1913 Webster]

            Within a while, Philoxenus came to see how onward
            the fruits were of his friend's labor. --Sir P.
                                                  Sidney.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Onward \On"ward\, adv.
   Toward a point before or in front; forward; progressively;
   as, to move onward.
   [1913 Webster]

         Not one looks backward, onward still he goes. --Pope.
   [1913 Webster]

WordNet (r) 3.0 (2006):

onward
    adv 1: forward in time or order or degree; "from that time
           forth"; "from the sixth century onward" [syn: forth,
           forward, onward]
    2: in a forward direction; "go ahead"; "the train moved ahead
       slowly"; "the boat lurched ahead"; "moved onward into the
       forest"; "they went slowly forward in the mud" [syn: ahead,
       onward, onwards, forward, forwards, forrader]