klondike: a form of solitaire that begins with seven piles of cards with the top cards facing up; descending sequences of cards of alternating colors are built on these piles; as aces become available they are placed above the seven piles; the object is to build sequences in suit from ace to king as the remaining cards are dealt out one at a time
solitaire: a card game played by one person
summer: the warmest season of the year; in the northern hemisphere it extends from the summer solstice to the autumnal equinox