An expression is a way of showing what you think or feel. When you smile, frown, or look surprised, your face makes an expression that tells others your emotions without words. Artists create expressions through paintings, musicians through songs, and writers through stories.

The word also means a particular phrase or saying. “Break a leg” is an expression actors use to wish each other good luck. “It's raining cats and dogs” is an expression meaning it's raining very hard. These expressions carry meanings beyond their literal words.

In mathematics, an expression is a combination of numbers and symbols that represents a value. The expression 3 + 5 equals 8, while 2x + 7 contains a variable. Mathematical expressions follow specific rules, just like sentences follow grammar rules.

You might hear about freedom of expression, which means people's right to share their ideas and opinions openly. When a teacher encourages creative expression in art class, she wants students to show their unique perspectives and feelings through their work.

When you express yourself, you're pressing your inner thoughts and feelings outward so others can understand them. Whether through words, art, music, math, or even the look on your face, expression is how we share what's inside with the world around us.