syllogistic a of or relating to or consisting of syllogism syllogistic reasoning Usage(s) It covered syllogistic inferences, universal and particular sentences, logic, differences of degree, relationships and styles of thought. Says Moderator John Daly admiringly: "Dottie follows a logical, syllogistic construction: she is more of a technician and a scientist in her approach. Twain speaks in formal, syllogistic sentences, especially when the subject is her job.