1. a card game played by one person, in which cards are arranged in columns and moved according to specific rules; solitaire.
Usage: also called Klondike solitaire; common in card games
2. a source of great wealth or profit; a bonanza.
Usage: informal; often capitalized when referring to the Klondike Gold Rush region

Examples

• She spent the afternoon playing klondike on her computer.
• The startup found a klondike in the emerging tech market.
• Klondike solitaire is one of the most popular card games for a single player.
• Investors hoped the new oil field would be their klondike.
• He shuffled the deck and began a game of klondike.
• The discovery of the mineral deposit turned out to be a real klondike for the mining company.