Real Dictionary

calypso
countable noun: A calypso is a song about a current subject, sung in a style which originally comes from the West Indies.

Calypso in American English
a calypso song or calypso music
designating or of songs improvised and sung as originally by the native people of Trinidad: they are satirical ballads, usually topical, characterized by wrenched syllabic stress and syncopated rhythms
in Homer's Odyssey, a sea nymph who keeps Odysseus on her island for seven years
intransitive verb: to sing or dance to calypso
noun: a sea nymph who detained Odysseus on the island of Ogygia for seven years

Calypso in British English
noun: (in Homer's Odyssey) a sea nymph who detained Odysseus on the island of Ogygia for seven years

calypso in British English 1
noun: a popular type of satirical, usually topical, West Indian ballad, esp from Trinidad, usually extemporized to a percussive syncopated accompaniment

calypso in British English 2
noun: a rare temperate orchid of northern regions, Calypso (or Cytherea) bulbosa, whose flower is pink or white with purple and yellow markings