solitaire

A person who lives alone; a recluse or hermit.

1722-1723, Alexander Pope, letter to a lady […] he really wishes he had never beheld you, nor yours. You have spoiled him for a solitaire, and a book, all the days of his life; and put him into such a condition, that he thinks of nothing, and enquires of nothing but after a person who has nothing to say to him, and has left him for ever […]

A game for one person, played on a board with pegs or balls, in which the object is, beginning with all the places filled except one, to remove all but one of the pieces by "jumping", as in draughts.

The early French solitaire boards were marked with thirty-seven holes instead of the modern board's thirty-three; and the problems were more difficult.

Any of various card games that can be played by one person.

You like to sit high on a hill / Count the daisies in the field / It's your own way of playing solitaire / You won't answer no question / Or say where you've been / The last thing you think you need is a friend

Mr. Greenwood said yesterday that he always finished his work in a timely fashion, and that he played solitaire only when there was nothing else left to do, usually a few times a week or during lunch breaks.

Ellipsis of Rodrigues solitaire (Pezophaps solitaria), an extinct bird related to the dodo.

Ellipsis of Réunion solitaire (Raphus solitarius, now Threskiornis solitarius), an extinct bird formerly believed to be related to the dodo.

Living or being alone; solitary.