Entry 1 sense Webster, 1913 Sided /sīd'-ĭd/ · Sid·ed · IPA /ˈsaɪdɪd/ 01 a. Having (such or so many) sides; -- used in composition; as, one-sided; many-sided. 1. Having (such or so many) sides; -- used in composition; as, one-sided; many-sided.