adj

• (informal) Very amusing.
  "The scene was a rich one."
• (informal) Ridiculous, absurd, outrageous, preposterous, especially in a galling, hypocritical, or brazen way.
  "That's rich, coming from you."
• (slang, uncommon) Pornographic; titillating.
• (computing) Elaborate, having complex formatting, multimedia, or depth of interaction.
  "A skilled multimedia developer will have no problems adding interactive video and audio into existing rich media web pages."

noun

• (with the) The rich people of a society or the world collectively, the rich class of a society.
  "Let me tell you about the very rich. They are different from you and me. They possess and enjoy early, and it does something to them, makes them soft where we are hard, and cynical where we are trustful, in a way that, unless you were born rich, it is very difficult to understand. They think, deep in their hearts, that they are better than we are..."

verb

• (obsolete, transitive) To enrich.
  "And than he shall be riched ſo, That it may faile nevermo"
• (obsolete, intransitive) To become rich.