1. the act or process of replacing one thing with another
Usage: plural of substitution
2. things that are used in place of other things
Usage: plural of substitution
3. changes made to players during a sports game
Usage: sports context; plural of substitution

Examples

• The recipe allows for several ingredient substitutions.
• The coach made three substitutions in the second half.
• Emergency substitutions were needed when the regular teachers got sick.
• The math problem involved algebraic substitutions.
• Food substitutions can help people with allergies enjoy meals.
• The theater company had to make last-minute actor substitutions.
• Chemical substitutions changed the compound’s properties.