one-sidedEnglishOxford American Thesaurusone-sided adjective 1 foreign publications have been criticized for alleged one-sided reporting: biased, prejudiced, partisan, partial, preferential, discriminatory, colored, inequitable, unfair, influenced, slanted, unjust, narrow-minded, bigoted. ▷antonyms fair-minded. 2 a one-sided game: unequal, uneven, unbalanced, lopsided.