Expression

Expression may refer to:

Symbolic expression
 * Expression (language), a thought communicated by language
 * Expression (mathematics), a finite combination of symbols that are well-formed according to applicable rules
 * Expression (programming), an instruction to execute something that will return a value
 * Regular expression, a means of matching strings of text in computing
 * Expression marks, (music) notating the musical dynamics

Bodily expression
 * The expression of milk
 * Emotional expression, verbal and non-verbal behaviour that communicates emotion
 * Facial expression, a movement of the face that conveys emotional state
 * Gene expression, the process by which information from a gene is used in biochemistry
 * Expression (sign language), the expressions and postures of the face and body that contribute to the formation of words when signing

Product names
 * Expression (album), an album by John Coltrane
 * Expressions (album), an album by Chick Corea
 * Expressions, an album by Jon Secada
 * Expression crew, a breakdance crew.
 * Expressions, the annual magazine of Vidyalankar Institute of Technology, Mumbai, India
 * Microsoft Expression Studio, a digital media and graphic design suite
 * Ex'pression College for Digital Arts, a college in Emeryville, California for the entertainment industry

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