- 1(disapproving) (of an argument, opinion, etc.) showing only one side of the situation; not balanced synonym biased The media were accused of presenting a very one-sided picture of the issue.
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- 2(of a competition or a relationship) involving people who have different abilities; involving one person more than another a totally one-sided match a one-sided conversation (= in which one person talks most of the time)
Check pronunciation: one-sided