(plural phalanxes) An ancient Greek and Macedonian military unit that consisted of several ranks and files (lines) of soldiers in close array with joined shields and long spears.
(historical sociology) A Fourierite utopian community; a phalanstery.
(plural phalanxes) A large group of people, animals or things, compact or closely massed, or tightly knit and united in common purpose.
(plural phalanges) One of the bones of the finger or toe.