The word rich has many meanings:

• Wealthy: "Bill Gates is a rich man."
• Having lots of natural resources: "Alaska is rich in oil."
• Elaborate or luxurious: "That was a very rich banquet."
• Being of good or strong qualities, flavours, or ingredients: "The chocolate cake was very rich."
• Full, deep, mellow or vivid: "The painter used a very rich palette."
• Very amusing or absurd (Slang): "Give you $20? Yeah, that's rich."

Rich can also be short for the name Richard.