expression

noun
  1. The act of conveying thoughts, feelings, or ideas, often through speech, writing, or art. noun
    Her expression of gratitude was heartfelt and sincere.
    Poetry is a powerful form of expression.
  2. A look on someone's face that conveys a particular emotion or feeling. noun
    His expression changed from joy to disbelief.
    She had a puzzled expression on her face.
  3. A word or phrase used in a particular context or with a specific meaning. noun
    The expression 'break a leg' is often used to wish someone good luck.
    He used a colloquial expression that was unfamiliar to me.
  4. The process of making known one's thoughts or feelings. noun
    Artistic expression can be therapeutic.
    Freedom of expression is a fundamental human right.
  5. In mathematics, a combination of symbols that represents a value or relationship. noun
    The expression 2x + 3 equals 11 when x is 4.
    Simplifying the expression made the equation easier to solve.