Substitute
Definition 1 of 4
Pro Tip 1/3
Temporary Replacement
Refers to someone who takes a place for a short time, not permanently. Sara was a substitute teacher for just one week.
Pro Tip 2/3
Not Identical
The substitute might be similar but not exactly the same as what it replaces. Almond milk can be a good substitute for cow's milk in recipes.
Pro Tip 3/3
Plan B
A substitute often acts as a backup option when the original is unavailable. An in-class assignment was the substitute for the canceled field trip.