Source : Webster's Revised Unabridged Dictionary (1913)

One-sided \One`-sid"ed\, a.
   1. Having one side only, or one side prominent; hence,
      limited to one side; partial; unjust; unfair; as, a
      one-sided view or statement. ``Unguarded and one-sided
      language.'' --T. Arnold.

   2. (Bot.) Growing on one side of a stem; as, one-sided
      flowers. -- {One`-sid"ed-ly}, adv. -- {One`-sid"ed*ness},
      n.

Source : WordNet®

one-sided
     adj 1: not reversible or capable of having either side out [syn: {nonreversible}]
            [ant: {reversible}]
     2: involving only one part or side; "unilateral paralysis"; "a
        unilateral decision" [syn: {unilateral}] [ant: {multilateral},
         {bilateral}]
     3: out of proportion in shape [syn: {ill-proportioned}, {lopsided}]
     4: favoring one person or side over another; "a biased account
        of the trial"; "a decision that was partial to the
        defendant" [syn: {biased}, {colored}, {coloured}, {slanted}]
     5: excessively devoted to one faction [syn: {biased}]