1. adjective /ˈɹəʊm.ən,ˈɹoʊmən/
a) Of or from Rome.
b) Of or from the Roman Empire
2. noun /ˈɹəʊm.ən,ˈɹoʊmən/
a) A native or resident of Rome.
You will find the term defined at the end of Roman one.
b) A native or resident of the Roman Empire
Wikipedia foundation.