This is a very old garment referred to in the Koran in which women are ordered to "pull their hilbab around them" and thus, this refers to any covering full-length coat or cloak worn over their clothes to conceal them. This is an umbrella term and encompasses many different styles of over-garments including the Chador, Abaya, Melaya and others.

woman's long, loose outer-garment.

A long coat or cloak; more generally, any type of outergarment that covers from the shoulders to the ankles. Commanded in Quran Surah al-Ahzab ayah 59

The term used in the Quran (Surah al-Ahzab ayah 59) to refer to the outergarment

A type of outergarment that looks like a long raincoat or trenchcoat

a long loose shirt dress that can be wore over house clothes

A long gown similar to an abaya that is worn outside but differs in that it is available in many different colours with less subtle designs than an abaya. Jilbab is not to be confused with jalabiya as the latter is a similar garment albeit for indoor use only.