I think you're defined by your style if you've become a slave to it. Particularly those who only buy from the "it" designer of the moment for prestige sake.
On the other hand, if you like the feel of cashmere and fine silks and that dominates your wardrobe, then you are defining your style.
I'm still trying to figure out what my style is but I'm getting bolder in trying new things. When considering a new trend/look, I try to keep my shape in mind. If I admire a gal's bold print dress but I know the print would swallow up my petite body, then I would instead look for a scarf, bracelet, maybe even ballet flats that had the same bold print vibe.
I got excited about a yellow swing jacket and showed it to a friend and she said, "Oh, that bold color is so you." That surprised me because I didn't think I wore much in the way of bold colors. Although she herself tends to wear mostly black and blues so I guess to her, I do dress boldly. So that's another thing, depending on who is doing the looking your style can seem different to different people.
Definitely keeping yourself informed about style/fashion from magazines, blogs, etc. can help you fine tune/remake your style. I usually have an initial gut feeling when I see an outfit photo. "Yuck" or "That's interesting." So I pay attention to the interesting ones and further evaluate what I like about it. Is it just the colors, the way it fits the body, the textures, etc. Then I go from there and see how I can translate that into my wardrobe.
I am enjoying my style journey and I don't see the need to get to a certain point and say, "OK, I'm done learning." I look forward to keeping abreast of all there is out there and evaluating if that's something I want to try.
