From Longman Dictionary of Contemporary Englishsolitairesol‧i‧taire /ˌsɒləˈteə $ ˌsɑːləˈter/ noun 1 
[uncountable]DGD a game played by one person with small wooden or plastic pieces on a board2 [countable]DCJ a single jewel, or a piece of jewellery with a single jewel in it, especially a large diamond a diamond solitaire3 [uncountable] American EnglishDGC a game of cards for one person SYN patience British English
[uncountable]DGD a game played by one person with small wooden or plastic pieces on a board2 [countable]DCJ a single jewel, or a piece of jewellery with a single jewel in it, especially a large diamond a diamond solitaire3 [uncountable] American EnglishDGC a game of cards for one person SYN patience British EnglishExamples from the Corpus
solitaire• So I play patience, and solitaire.• Another solitaire! the only one I know.• Peg's with a few books, playing cards, solitaire board, jar of caramels.• They taught me darning, knitting, embroidering, mending, solitaire, palm-reading, whatever they knew.• I ate and then watched Jack playing solitaire and losing.• The old man sat playing solitaire at a card table in front of the stone fireplace.• Solving solitaire centres I have always envied John and Barbara's solitaire board.Origin solitaire (1700-1800) French Latin solitarius; → SOLITARY1 