The revival of the Hebrew language took place in Europe and the Southern Levant toward the end of the 19th century and into the 20th century, through which the language's usage changed from the purely sacred language of Judaism to a spoken and written language used for daily life among the Jews in Palestine, and later Israel. Eliezer Ben-Yehuda is often regarded as the "reviver of the Hebrew language" having been the first to raise the concept of reviving Hebrew and initiating a project known as the Ben-Yehuda Dictionary. The revitalization of Hebrew was then ultimately brought about by its usage in Jewish settlement in Ottoman Palestine that arrived in the waves of migration known as the First Aliyah and the Second Aliyah. In Mandatory Palestine, Modern Hebrew became one of three official languages and after the Israeli Declaration of Independence in 1948, one of two official languages of Israel, along with Modern Arabic. In July 2018, a new law made Hebrew the sole national language of the State of Israel, while giving Arabic a "special status".

More than purely a linguistic process, the revival of Hebrew was utilized by Jewish modernization and political movements, leading many people to change their names and becoming a tenet of the ideology associated with aliyah, renaming of the land, Zionism and Israeli policy.

The process of Hebrew's return to regular usage is unique; there are no other examples of a natural language without any native speakers subsequently acquiring several million native speakers, and no other examples of a sacred language becoming a national language with millions of native speakers.

The language's revival eventually brought linguistic additions with it. While the initial leaders of the process insisted they were only continuing "from the place where Hebrew's vitality was ended", what was created represented a broader basis of language acceptance; it includes characteristics derived from all periods of Hebrew language, as well as from the non-Hebrew languages used by the long-established European, North African, and Middle Eastern Jewish communities, with Yiddish being predominant.

Historical records testify to the existence of Hebrew from the 10th century BCE to the late Second Temple period (lasting to 70 CE), after which the language developed into Mishnaic Hebrew. From about the Babylonian Captivity in the 6th century BCE until the Middle Ages, many Jews spoke Aramaic, a related Semitic language. From the 2nd century CE until the revival of Hebrew as a spoken language circa 1880, Hebrew served as a literary and official language and as the Judaic language of prayer. After the spoken usage of Mishnaic Hebrew ended in the 2nd century CE, Hebrew had not been spoken as a mother tongue.

Even so, during the Middle Ages, Jews used the language in a wide variety of disciplines. This usage kept alive a substantial portion of the traits characteristic of Hebrew. First and foremost, Classical Hebrew was preserved in full through well-recognized sources, chiefly the Tanakh (especially those portions used liturgically like the Torah, Haftarot, Megilot, and the Book of Psalms) and the Mishnah. Apart from these, Hebrew was known through hymns, prayers, midrashim, and the like.

During the Middle Ages, Hebrew continued in use as a written language in Rabbinical literature, including in judgments of halakha, responsa, Biblical and Talmudic commentaries, and books of meditation. In most cases, certainly in the base of Hebrew's revival, 18th- and 19th-century Europe, the use of Hebrew was not at all natural, but heavy in flowery language and quotations, non-grammatical forms, and mixing-in of other languages, especially Aramaic. Hebrew also functioned as a language of secular high culture, and as a lingua franca between Jews from disparate countries. Jewish scientists and historians such as Abraham Zacuto and David Gans wrote in Hebrew, as did travelers such as Benjamin of Tudela and Chaim Yosef David Azulai.

Hebrew experienced a particular flourishing in Islamic Spain, where, under the influence of contemporary Islamic culture, scholars such as Shmuel HaNagid, Judah HaLevi, and Abraham Ibn Ezra extensively engaged in secular Hebrew poetry, discussing topics such as love, nature, and wine. The works of these Sephardic poets greatly influenced future attempts at Hebrew poetry, including the modern revival. Outside of Spain, the Jews of Yemen were especially known until contemporary times for their tradition of poetry, exemplified by revered 17th century rabbi and poet Shalom Shabazi. Other secular poets of the post-Spain era include Immanuel the Roman and Israel ben Moses Najara.