common denominatorBrE/ˌkɒmən dɪˈnɒmɪneɪtə(r)/NAmE/ˌkɑːmən dɪˈnɑːmɪneɪtər/noun(mathematics数学) anumberthatcanbedividedexactlybyallthenumbersbelowthelineinasetoffractions公分母➡ comparedenominatoranidea, attitudeorexperiencethatissharedbyallthemembersofagroup(想法、态度或经验的)共同点➡ see alsolowest common denominator