Simple past tense and past participle of opinion.(verb)
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Use "opinioned" in a sentence
"As for opinions, I agree with Teresa that part of the fun is finding like-minded (like-opinioned?) bloggers."
"We should be able to disagree with a certain level of civility, but I do not agree that we are obligated to become a passive melded blob of single opinioned, mindless butt-kissers."
"They usually have points of views that are fixated and most of the time not valid, since they are usually the type who only reads the cover of the magazine to look smart, and then is opinioned about it."