1. the act of replacing one thing with another
2. a person or thing that takes the place of another
3. the replacement of one mathematical expression with another of equal value
Usage: mathematics

Examples

• The coach made a substitution in the second half.
• We need to make a substitution for the missing ingredient.
• The substitution of honey for sugar worked well in the recipe.
• Player substitutions are allowed during timeouts.
• The substitution method helped solve the equation.
• Emergency substitutions were made when the actor fell ill.
• The substitution of plastic for metal reduced the weight.