The Collaborative International Dictionary
Opiniaster
Opiniaster \O`pin*ias"ter\, Opiniatre \O`pin*ia"tre\, a. [OF.
opiniastre, F. opini[^a]tre. See Opinion.]
Opinionated. [Obs.]
--Sir W. Raleigh.
Wiktionary
opiniaster
n. (context obsolete English) An opinionated person.