substitution
Pronunciation: [sʌbstɪˈtjuːʃən]
Context: “education”
(noun) substitution in education means using a different person or thing instead of the usual one. For example, if a teacher is absent, another teacher might come in to teach the class.
Example
The school arranged for a substitution when the regular teacher was sick.
Example
There can be no substitution for the regular teacher when it comes to important lessons.
Example
Who will be the substitution for the teacher tomorrow?
Context: “sports”
(noun) in sports, substitution means changing one player for another during a game. It’s like when a coach takes a tired player out and puts another one in to keep the team strong.
Example
The coach made a smart substitution that allowed the team to win the game.
Example
The team lost because they made a bad substitution at a crucial moment.
Example
When will the coach make the next substitution?
Context: “cooking”
(noun) substitution in cooking is when you replace one ingredient with another. For example, if you don’t have butter, you might use oil instead.
Example
For this recipe, you can use applesauce as a substitution for oil.
Example
Using salt as a substitution for sugar would not work well in this cake.
Example
What is the best substitution for eggs if I am allergic?
Context: “mathematics”
(noun) in mathematics, substitution means replacing a variable with a number or another expression to solve a problem. It’s like putting in the right number to see what happens.
Example
The student used substitution to find the value of x in the equation.
Example
She couldn't solve the problem because she forgot the substitution step.
Example
How does substitution help us solve this math problem?