From the Proto-Semitic root *ʔarṣ̂-, shared across the family: Hebrew אֶרֶץ (ʾéreṣ), Aramaic אַרְעָא (arʿā), and Akkadian erṣetu — all meaning "earth, land, ground." The word appears hundreds of times in the Quran, often in the paired phrase السَّمَاوَاتِ وَالأَرْض (the heavens and the earth), giving it a deeply sacred and cosmological resonance in Arabic literary tradition.

In Classical and Modern Standard Arabic, الأَرْض (al-arḍ) with the definite article specifically means "the Earth" or "the land" in a grand sense. In everyday spoken dialects, the word is widely used with the same meaning but often pronounced differently — e.g., /arḍ/ in Egyptian Arabic and /arð/ in some Gulf dialects. The word also appears in many Arabic place names and family names across the Arab world, reflecting how central the concept of land is to identity and heritage.