1. things that do not change or vary; fixed or unchanging elements
2. numbers or quantities that have fixed values in mathematical equations or scientific formulas
Usage: mathematics; science

Examples

• Death and taxes are often called life’s only constants.
• The speed of light and gravitational acceleration are important physical constants.
• In this equation, a and b are variables while c is a constant.
• The constants in her daily routine helped her stay organized.
• Mathematical constants like pi appear in many formulas.
• Scientists rely on universal constants to make accurate calculations.
• Change is inevitable, but some constants remain throughout history.