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.
[citation needed] ^b Denotes the number (if known) of languages within the family.
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