Chic: A Definition

Traditionally 

1. smart elegance and sophistication especially of dress or manner 

2. a distinctive mode of dress or manner associated with a fashionable lifestyle, ideology, or pursuit  

                                                                                            

                  - Merriam-Webster Dictionary

Today

1. a classy, sophisticated manner; glamorous without being a pushover and without being flashy - it is an element of class

- Urban Dictionary