1.  actium(n = noun.location) - an ancient town on a promontory in western Greece;
is a kind of town
is a part of ellas, greece, hellenic republic

2.  actium(n = noun.act) - the naval battle in which Antony and Cleopatra were defeated by Octavian's fleet under Agrippa in 31 BC;
is a kind of naval battle

   naval battle where Antony and Cleopatra were defeated by Octavian's fleet under Agrippa in 31 BC. [WordNet 1.5]