Personally define “the lifestyle”? I’d say it’s the practice of kink, the engagement in BDSM-type interactions with others, and the acknowledgment of my proclivities on a personal level.
As for the words: in order of what? How much I identify with them? Bisexual and submissive I’m pretty sold on, though I’ve got some switchy tendencies. As for polyamorous, it’s something I’m only starting to explore and I’m not even sure if it’s the perfect term yet. But, I’m working my way through that to try to come to an understanding within myself.
I hope this answered your question.