noun🔗ShareThe top stone of an arch."The keystones at the top of the old stone bridge held the entire structure together. "architecturebuildingpartstructureChat with AIVocabulary GamePractice Reading
noun🔗ShareSomething on which other things depend for support."In many successful projects, clear communication and strong teamwork are the keystones. "structurebuildingChat with AIVocabulary GamePractice Reading
noun🔗ShareA native or resident of the American state of Pennsylvania.""Many keystones travel to Philadelphia for the annual Pennsylvania Dutch Festival." "statepersonChat with AIVocabulary GamePractice Reading
noun🔗Share(retail) A retail price that is double the cost price; a markup of 100%."Many small retailers rely on keystones to ensure profitability, meaning they double their cost when setting the final price for their products. "businesscommerceeconomyfinanceChat with AIVocabulary GamePractice Reading
noun🔗ShareThe combination of the shortstop and second baseman."The team's keystones were excellent; their double plays consistently shut down the opposing offense. "sportpositionChat with AIVocabulary GamePractice Reading
