The rebab (Arabic الربابة or ربابة - "a bowed (instrument)"), also rebap, rabab, rebeb, rababah, or al-rababa) is a type of string instrument so named no later than the 8th century and spread via Islamic trading routes^{[citation needed]} over much of North Africa, the Middle East, parts of Europe, and the Far East. The bowed variety often has a spike at the bottom to rest on the ground, and is thus called a spike fiddle in certain areas, but there exist plucked versions like the kabuli rebab (sometimes referred to as the robab or rubab). Furthermore, besides the spike fiddle variant, there also exists a variant with a pear-shaped body, quite similar to the Byzantine lyra and the Cretan lyra. This latter variant travelled to western Europe in the 11th century, and became the rebec.

This article will only concentrate on the spike-fiddle rebab, which usually consists of a small, usually rounded body, the front of which is covered in a membrane such as parchment or sheepskin and has a long neck attached. There is a long thin neck with a pegbox at the end and there are one, two or three strings. There is no fingerboard. The instrument is held upright, either resting on the lap or on the floor. The bow is usually more curved than that of the violin.