ASSUMPTIVE
assumptive
(adjective) accepted as real or true without proof; āthe assumed reason for his absenceā; āassumptive beliefsā
assumptive, assuming, presumptuous
(adjective) excessively forward; āan assumptive personā; āon a subject like this it would be too assuming for me to decideā; āthe duchess would not put up with presumptuous servantsā
Source: WordNet® 3.1
Adjective
assumptive (comparative more assumptive, superlative most assumptive)
Held as true or valid without evidence.
Forward or presumptuous.
(heraldry, of arms, not comparable) Originally, being arms which a person had a right to assume, in consequence of an exploit; now, those assumed without sanction of the Heralds' College.
Source: Wiktionary
As*sump"tive, a. Etym: [L. assumptivus, fr. assumptus, fr. assumere.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition