definition of
Pluto

[1] #1 Pluto n. a cartoon character created by Walt Disney. wn

[2] #2 Pluto n. [Hades, Aides, Aidoneus] (Greek mythology) the god of the underworld in ancient mythology; brother of Zeus and husband of Persephone. wn

[3] #3 Pluto n. a small planet and the farthest known planet from the sun; it has the most elliptical orbit of all the planets; "Pluto was discovered by Clyde Tombaugh in 1930". wn