Hebrew is a Semitic language of the Afro-Asiatic family. It was once a dialect of the Canaanite language, but other dialects have died out. Hebrew existed as a spoken language in ancient times until the turn of the 4th century CE, when it began to be replaced by Aramaic, but it persisted as a literary language, largely due to the Hebrew Bible used by the Jewish faith. Today, Hebrew is once again a spoken language in Israel and other Jewish communities, and it boasts around 15 million speakers worldwide.

There are many different dialects of Hebrew, with the various versions spoken in ancient Palestine between the 10th century BCE and and 4th century CE being collectively referred to as Classical Hebrew and further subdivided into the earlier Biblical Hebrew, which was spoken up to the 1st century CE, and the later Mishnaic Hebrew, which existed during the 1st to 4th century CE. Amoraic Hebrew was a strictly literary language that coexisted with Mishnaic Hebrew, and both forms, collectively called Rabbinic Hebrew, were used in the Talmud, a record of rabbinic commentary on Jewish law and culture written between the 3rd and 5th centuries CE. In the Medieval era, there were many regional dialects of Hebrew, the most important of which, Tiberian or or Masoretic Hebrew, is sometimes referred to as Biblical Hebrew because it is used to pronounce the Bible. However, this form of Hebrew must be distinguished from true Biblical Hebrew, spoken during the time of the Bible, of which no record of pronunciation exists.

Before Hebrew reemerged as a spoken language, it was used in Jewish religious practices around the world, and liturgical pronunciation styles differ according to region. Ashkenazi Hebrew is the dialect of Central and Eastern Europe, and it is still used in Ashkenazi religious study and services around the world. Sephardi Hebrew, the basis of the Hebrew used by native speakers in Israel, arose in the Iberian peninsula and the former Ottoman Empire. Mizrahi or Oriental Hebrew encompasses a number of Middle-Eastern dialects.

The resurgence of Hebrew as a secular language began in the mid-19th century, when Jewish writers began to produce novels and poetry in Hebrew. Eliezer Ben-Yehuda, a resident of Palestine around the turn of the 20th century, developed the Standard Hebrew spoken in Israel today. He was also instrumental in developing schools and textbooks to promote spoken Hebrew, and after a large influx of mostly Russian Jews to Palestine between 1904 and 1914, the movement towards a spoken Hebrew language took off. The British Mandate of Palestine established Hebrew as an official language in 1922.

Hebrew benefited Palestinian Jews, as they came from diverse areas of the world and did not have a common tongue. The Academy of the Hebrew Language was founded around the turn of the 20th century as well and continues to regulate the language. Today, there are two dialects of spoken Hebrew, in addition to the liturgical dialects discussed above. These are Standard Hebrew and Oriental Hebrew, and they differ mainly in phonology, or pronunciation.