Hejazi Arabic or Hijazi Arabic (HA), also known as West Arabian Arabic, is a variety of Arabic spoken in the Hejaz region in Saudi Arabia. Strictly speaking, there are two main groups of dialects spoken in the Hejaz region, one by the urban population, originally spoken mainly in the cities of Jeddah, Mecca, Medina and partially in Ta'if and another dialect by the urbanized rural and bedouin populations. However, the term most often applies to the urban variety which is discussed in this article.

The Arabic alphabet, or Arabic abjad, is the Arabic script as specifically codified for writing the Arabic language. It is written from right-to-left in a cursive style, and includes 28 letters, of which most have contextual letterforms. The Arabic alphabet is considered an abjad, with only consonants required to be written; due to its optional use of diacritics to notate vowels, it is considered an impure abjad.