fac·tion·al \ˈfakshənəl, -shnəl\adjective 1.: of or relating to a faction < a factional leader > 2. a.: characterized by faction b.: occurring between factions < factional disputes within the party > • fac·tion·al·ism\-əlˌizəm, -əˌli-\noun-s • fac·tion·al·ly\-əl]ē, -əl]ē, ]i\adverb