ˌone-ˈsided BrE AmE adjective
1 . considering or showing only one side of a question, subject etc in a way that is unfair ⇨ biased , balanced :
The newspapers give a very one-sided account of the war.
2 . an activity or competition that is one-sided is one in which one person or side is much stronger or does much more than the other:
a very boring, one-sided game
The conversation was very one-sided.
—one-sidedly adverb
—one-sidedness noun [uncountable]