You searched English word "Keystone" meaning in French that is "clé de voûte". Keystone is a Noun. We Spell Keystone as [kee-stohn]. Keystone meaning in French has been searched 1686 ( one thousand six hundred eighty six ) times till today 23/09/2026. Get translation of the word Keystone in Urdu and Roman Urdu. Learn how to speak Keystone Word in French and English. You may also find the meaning of Word Keystone in English to French, Urdu, Arabic, Spanish, German, Hindi and other languages.