Solitaire is Actually Called Klondike
Thanks to Microsoft, almost everyone is familiar with the card game of solitaire. It was included with the first home computers, so most people had access to it growing up. We all refer to the game as Solitaire because Microsoft chose that name for it. In actuality, solitaire is more of a type of game than a specific game. Klondike Solitaire was the game that Microsoft taught us all to play. It might be referred to as Patience in the UK. There are plenty of different Solitaire games available. In essence, it's Solitaire if you can play it by yourself. The only genuine rule is that.
The earliest known instance of Solitaire was in 1746, and at the time, it was a game intended to be played with pegs and marbles. There are obviously many other permutations, but as long as there is only one player, it is considered to be a game.