Bilbaoan adjective 1noun 1forms 1 adjective1 •Of, from or relating to the city of Bilbao, Basque Country, Spain.Antonio's good grammar and mathematical skills landed him a job in the store of an old Bilbaoan friend of his uncle two blocks from the latter's residence. — 1998 noun1 •A native or inhabitant of the city of Bilbao, Basque Country, Spain.During the French occupation, Bilbaoans were likely to have been exposed to some French culture and influence. — 1989 formsBilbaoans