1. look on somebody's face: a look on somebody's face, conveying a thought or feeling listened with a puzzled expression
2. language word or phrase: a word or phrase that communicates an idea It's a common expression in this part of the country.
3. conveying of thoughts or feelings: the communication of thoughts or feelings, e.g. directly to another person or through a work of art a heart-rending expression of sorrow
4. way of communicating something: something done or given as a means of communicating a feeling or thought to somebody else As an expression of my gratitude, I'd like you to accept this vase.
5. inflection in voice: somebody's intonation or tone of voice
6. music interpretive element of music: the interpretive element of music, including tempo, dynamics, articulation, and phrasing, by which a player or singer evokes emotions
7. mathematics mathematical representation: a combination of constants, operators, and variables representing numbers or quantities an algebraic expression