The Collaborative International Dictionary of English v.0.48:
Courteously \Cour"te*ous*ly\, adv. In a courteous manner. [1913 Webster]WordNet (r) 3.0 (2006):
courteously adv 1: in a polite manner; "the policeman answered politely, `Now look here, lady...'" [syn: politely, courteously] [ant: discourteously, impolitely, rudely]