Tzniut describes the character trait of modesty and discretion, as well as a group of Jewish laws pertaining to conduct. The concept is most important within Orthodox Judaism.

In modern usage, hijab generally refers to various head coverings conventionally worn by many Muslim women. It is similar to the tichel or snood worn by Orthodox Jewish women, certain headcoverings worn by some Christian women, such as the mantilla, apostolnik and wimple, and the dupatta worn by many Hindu and Sikh women. Whilst a hijab can come in many forms, it often specifically refers to a scarf wrapped around the head, covering the hair, neck and ears but leaving the face visible. The use of the hijab has been on the rise worldwide since the 1970s and is viewed by many Muslims as expressing modesty and faith; it has also been worn for purposes of adornment. There is a consensus among Islamic religious scholars that covering the head is either required or preferred, though some Muslim scholars and activists point out that it is not mandated.