Baku baktun • baku · · · Info · Definitions · Characters · · Baku · · Text Latin · · Script 4 · · Length Definitions · · · (noun) a port city on the Caspian Sea that is the capital of Azerbaijan and an important center for oil production. Synonyms: capital of Azerbaijan. · · Noun Definition 1 Characters · · B latin capital letter b U+0042 a latin small letter a U+0061 k latin small letter k U+006B u latin small letter u U+0075