mean·ing·ful / ˈmēningfəl/ • adj. having meaning: meaningful elements in a language questions that are meaningful to students. ∎ having a serious, important, or useful quality or purpose: making our lives rich and meaningful. ∎ communicating something that is not directly expressed: meaningful glances and repressed passion. ∎ Logic having a recognizable function in a logical language or other sign system.DERIVATIVES: mean·ing·ful·ly adv.mean·ing·ful·ness n.