Assumptive \As*sump"tive\, a. [L. assumptivus, fr. assumptus, fr. assumere.] Assumed, or capable of being assumed; characterized by assumption; making unwarranted claims. -- {As*sump"tive*ly}, adv. {Assumptive arms} (Her.), originally, arms which a person had a right to assume, in consequence of an exploit; now, those assumed without sanction of the Heralds' College. --Percy Smith.