Definition of posilutely in English:

posilutely

(also postolutely, posolutely)

Pronunciation /ˈpɒzɪluːtli/ /ˌpɒzɪˈluːtli/

adverb

slang US
  • Emphatically; without a doubt, irrefutably. Also used as an emphatic affirmative: yes, certainly, definitely.

Origin

Early 20th century; earliest use found in The Syracuse Herald. In some forms apparently irregularly from posit- + -olutely.