>>94038738Solitaire is actually just an umbrella term to refer to classic card games you play on your own.
The "solitaire" commonly referred to with that name, is actually "klondike" (also known under other names, but klondike is the most used); other examples of "solitaires" are spider and freecell.
There are also regional solitaire games, which are less common because they are specific to a certain culture, etc.
Then you have variants created as mini-games for bigger games, which still count as solitaire.