Definitions from Wiktionary (Rainbow)

▸ noun:  A multicoloured arch in the sky, produced by prismatic refraction of light within droplets of rain in the air.
▸ noun:  Any prismatic refraction of light showing a spectrum of colours.
▸ noun:  (often used with “of”) A wide assortment; a varied multitude.
▸ noun:  (figurative) An illusion; a mirage.
▸ noun:  (baseball) A curveball, particularly a slow one.
▸ noun:  (soccer) A trick in which the player makes the ball arc over the opponent's head using both feet; rainbow kick
▸ noun:  (poker slang) In Texas hold 'em or Omaha hold 'em, a flop that contains three different suits.
▸ noun:  Rainbow trout.
▸ noun:  (figuratively, sometimes derogatory) A person within the LGBT community.
▸ adjective:  Multicolored, especially if in rainbow order.
▸ adjective:  (attributive, chiefly US) Made up of several races or ethnicities, or (more broadly) of several cultural or ideological factions.
▸ adjective:  (attributive) LGBT.
▸ adjective:  (poker, chiefly of a flop) Composed entirely of different suits.
▸ adjective:  (mathematics, cryptography) Of or pertaining to rainbow tables.
▸ verb:  (transitive) To brighten with, or as with, a rainbow; to pattern with the colours of the rainbow.
▸ verb:  (intransitive) To take the appearance of a rainbow.
▸ verb:  (climbing) In climbing gyms where the rocks to climb are colored to indicate suggested climbing routes, to climb rocks of different colors, thereby ignoring such routes.
▸ noun:  A member of the Rainbow Guides, a Girl Guide movement for younger girls.
▸ noun:  A census-designated place in San Diego County, California, United States.
▸ noun:  A surname.

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