Source : Webster's Revised Unabridged Dictionary (1913)

Onwards \On"wards\, adv. [See {-wards}.]
   Onward.

Source : WordNet®

onwards
     adv : 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}, {forward}, {forwards}, {forrader}]