What is cultural appropriation? and whats the difference between exploring a cultural and appropriating it?

Cultural appropriation is when someone tries to take on the appearance of another culture. The difference between exploring a culture and appropriating it is like for example, you can try (explore) different foods from different cultures but if all you eat is Chinese food when you're not Chinese is appropriation. And in all honesty in todays world, especially in America, cultures are so mixed that people should be able to dress any way they want without being accused of trying to steal from cultures. Accusing people of appropriation only keeps the separations that people have tried so hard to overcome. And only leaves the question, how can we overcome racism if we aren't willing to share our cultures?