To express one's opinion. The word is similar to conversate. Speakers who use conversate tend to also use opinionate.
That bitch was starting to opinionate about how much she don't like my clothes in front of the other girls at the party until I told her to shut the fuck up.
Having and voicing an opinion is different from being opinionated. Opinionated rightly has negative connotations because it means doggedly holding on to your opinions without considering circumstances and/or facts and/or advice/views of others.
Someone who isn't afraid to give their personal opinion. It doesn't have to be a bad thing. It's just someone that doesn't stay quiet, if they don't agree with something.
The only people who see it as bad and attach stigma (like the other definitions) to it are those that don't like to hear opinionated people talk.
Yes, you can be opinionated and polite at the same time. Being polite doesn't mean you have to agree with every objectionable thing that's said.
Just because I'm opinionated doesn't mean I'm a b*tch. I just like to share my thoughts.
An often irritating personality trait by which a stubborn, strong willed person always has to give their strong opinions, sometimes to the point of always believing they have to be right and have the last word.
I consider myself opinionated, but try to keep it under control so I don't irritate people.