a)noun that means "girl"
(even though English speaking people think it's used to call a hot chick, its meaning has no connotations, so it can be used both for pretty or ugly girls)
b)adjective that means "small", "little"
(the male use is "chico")
(Tonight I'm going out with the girls)
Ella es una chica y el es un chico.
(She's a girl and he's a boy)
b)Esa remera es demasiado chica, cambiala.
(that t-shirt is too small, change it.