Expression

The term “expression” comes from lat. expressio “squeezing; expressiveness”

Expression may refer to:

Linguistics

Expression (linguistics), a word, phrase, or sentence
Fixed expression, a form of words with a specific meaning
Idiom, a type of fixed expression
Metaphorical expression, a particular word, phrase, or form of words that has a different meaning than its literal form
Expression (sign language), the expressions and postures of the face and body that contribute to the formation of words when signing

Expression (architecture), implies a clear and authentic displaying of the character or personality of an individual person
Expression (mathematics), a finite combination of symbols that are well-formed according to applicable rules
Expression (computer science), an instruction to execute something that will return a value
Regular expression, a means of matching strings of text in computing
Expression marks, in music, notating the musical dynamics
Symbolic computation expression
S-expression

Expression of breast milk in breastfeeding
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 (album), a 1967 album by John Coltrane
Expressions (Chick Corea album), a 1994 album by Chick Corea
Expressions (Sarah Geronimo album), 2013
Expressions, an album by Jon Secada
"Expression" (song), a song by Salt-n-Pepa
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
The Expression (album)

Musical expression
Method of obtaining (vegetable) οil by pressure extraction, such as Expeller pressing
Self-expression values