1. a mathematical statement showing that two expressions are equal, typically connected by an equals sign
Usage: mathematics
2. a situation in which several things must be considered together
3. the process of making things equal or considering them as equal

Examples

• Solve the equation 2x + 5 = 11.
• The quadratic equation has two solutions.
• We need to balance the chemical equation.
• Money is not the only factor in the equation.
• The equation changes when you consider the environmental costs.
• Personal happiness must be part of the equation.
• The equation of supply and demand determines prices.