New and Used American Eagle RVs For Sale. Current American Eagle inventory - find local, new and used listings from private RV owners and dealers. American Coach American Eagle (79)
Definition of evolve for English Language Learners. : to change or develop slowly often into a better, more complex, or more advanced state : to develop by a process of evolution.
Definition of adaptation for English Language Learners. : 1  something that is adapted; especially : a movie, book, play, etc., that is changed so that it can be presented in another form. : 2  a change in a plant or animal that makes it better able to live in a particular place or situation.