Can I make my waist smaller if I'm already thin?

I am 5’3 and about 117 pounds. My measurements are 34B-27–38.
I work out three times a week and mostly focus on weight training. I think I’m pretty fit and I have some abs but I would like it if my waist was thinner to get that curvier look. I’m not sure if 27 is as small as my waist goes…because I’ve always had this size since I was 14 (I’m 22 now).
If possible how do I achieve this, lose some pounds?
Some fitness expert online said I can always make it smaller. Is it possible for my waist to get skinnier and go more ‘inward’ so I could have more defined curve between my waist and hips?