one-sided

a. 1. Having one side only, or one side prominent. [ 1913 Webster ]

2. Hence: Limited to one side; favoring one person or side over another; partial; unjust; unfair; as, a one-sided view or statement. [ wns=5 ] “Unguarded and one-sided language.” T. Arnold.
Syn. -- biased, colored, slanted. [ 1913 Webster ]

3. Having one team or party greatly superior; strongly favoring only one side; uneven; imbalanced; unequal; as, a one-sided contest; -- of contests, generally. [ wns=4 ] [ PJC ]

4. (Bot.) Growing on one side of a stem; as, one-sided flowers. [ 1913 Webster ]

5. Using only one side, or having only one side usable; as, one-sided printing; one-sided film; -- used mostly of sheets of material used for printing or imaging. [ PJC ]

6. Performed by only one party or side; -- of actions directly affecting more than one party. Opposite of multilateral. [ wns=2 ]
Syn. -- unilateral (vs. bilateral). [ WordNet 1.5 +PJC ]

7. out of proportion in shape.
Syn. -- ill-proportioned, lopsided. [ WordNet 1.5 ]

8. Not reversible or capable of having either side out; -- of cloth fabrics or clothing. Opposite of reversible. [ wns=1 ]
Syn. -- nonreversible. [ WordNet 1.5 ]

-- One`-sid"ed*ly, adv. -- One`-sid"ed*ness, n. [ 1913 Webster ]