Arabization or Arabicization (Arabic: تعريب, romanized: taʻrīb) is a sociological process of cultural change in which a non-Arab society becomes Arab, meaning it either directly adopts, is forced to accept, or becomes strongly influenced by the Arabic language, culture, literature, art, music, and ethnic identity as well as other socio-cultural factors. It is a specific form of cultural assimilation that often includes a language shift. The term applies not only to cultures, but also to individuals, as they acclimate to Arab culture and become "Arabized". Arabization took place after the Muslim conquest of the Middle East and North Africa, as well as during the more recent Arab nationalist policies toward non-Arabic speaking minorities in modern Arab states, such as Algeria, Iraq, Syria, Egypt, Bahrain, and Sudan.

After the rise of Islam in the Hejaz and subsequent Muslims conquests, Arab culture and language spread outside the Arabian Peninsula through trade and intermarriages between members of the non-Arab local population and the peninsular Arabs. The Arabic language began to serve as a lingua franca in these areas and various dialects were formed. This process was accelerated by the migration of various Arab tribes outside of Arabia, such as the Arab migrations to the Maghreb and the Levant.

The influence of Arabic has been profound in many other countries whose cultures have been influenced by Islam. Arabic was a major source of vocabulary for various languages. This process reached its zenith between the 10th and 14th centuries, widely considered to be the high point of Arab culture, during the Islamic Golden Age.

After Alexander the Great, the Nabataean Kingdom emerged and ruled a region extending from north of Arabia to the south of Syria. The Nabataeans originated from the Arabian peninsula, who came under the influence of the earlier Aramaic culture, the neighbouring Hebrew culture of the Hasmonean kingdom, as well as the Hellenistic cultures in the region (especially with the Christianization of Nabateans in the 3rd and 4th centuries). The pre-modern Arabic language was created by Nabateans, who developed the Nabataean alphabet which became the basis of modern Arabic script. The Nabataean language, under heavy Arab influence, amalgamated into the Arabic language.

The Arab Ghassanids were the last major non-Islamic Semitic migration northward out of Yemen in late classic era. They were Greek Orthodox Christian, and clients of the Byzantine Empire. They arrived in Byzantine Syria which had a largely Aramean population. They initially settled in the Hauran region, eventually spreading to the entire Levant (modern Lebanon, Israel, Palestine and Jordan), briefly securing governorship of parts of Syria and Transjordan away from the Nabataeans.

The Arab Lakhmid Kingdom was founded by the Lakhum tribe that emigrated from Yemen in the 2nd century and ruled by the Banu Lakhm, hence the name given it. They adopted the religion of the Church of the East, founded in Assyria/Asōristān, opposed to the Ghassanids Greek Orthodox Christianity, and were clients of the Sasanian Empire.

The Byzantines and Sasanians used the Ghassanids and Lakhmids to fight proxy wars in Arabia against each other.

The most significant wave of "Arabization" in history followed the early Muslim conquests of Muhammad and the subsequent Rashidun and Umayyad Caliphates. These Arab empires were the first to grow well beyond the Arabian Peninsula, eventually reaching as far as Iberia in the West and Central Asia to the East, covering 11,100,000 km² (4,300,000 sq mi), one of the largest imperial expanses in history.