What is hijab?

Per Islam religion, Hijab is the cloth that covers Head, all hair, ears, neck, and the upper chest part, but not covering face.

Wikipedia sources mention that:
A hijab or ijāb (حجاب), as commonly understood in the English-speaking world, is the type of head covering traditionally worn by Muslim women, but can also refer to modest Muslim styles of dress in general. Similar head coverings (Wimple or Wimpel) are also worn by traditional orthodox Christian and Jewish women. The Arabic word literally means curtain or cover (noun), based on the root حجب meaning "to cover, to veil, to shelter". Most Islamic legal systems define this type of modest dressing as covering everything except the face and hands in public. According to Islamic scholarship, hijab is given the wider meaning of modesty, privacy, and morality; the word for a headscarf or veil used in the Koran is khimār (خمار) and not hijab. Still another definition is metaphysical, where al-hijab "refers to the veil which separates man or the world from God."

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