Chai (Hebrew pronunciation: [xai], occasionally (hai) is a symbol and word that figures prominently in Jewish culture and consists of the letters of the Hebrew alphabet Chet(ח) and Yod(י).

In the Hebrew language, the word chai (חַי) spelled by these two letters means "living," is related to the term for "life," chaim, and also appears in the slogan "'am yisrael chai!" (עַם יִשְׂרָאֵל חַי, "The people of Israel live!",).