In sign languages, expressions are the distinctive body postures and facial expressions that accompany signing, and which are necessary to properly form words. Expression is one of five components of a sign, along with handshape (DEZ), orientation (ORI), location (TAB), and movement (SIG). A major component of expression is mouthing. However, not all signs have an inherent expression. [citation needed]
Signs with two different expressions. The pursed lips and partly closed eyes on the left, and raised lip on the right, are necessary for proper formation of the signs.