substitute · ​. a person or thing that you use or have instead of the one you normally use or have. a meat substitute; a substitute family · ​. (also informal sub).

to take the place of someone or something else; to use someone or something instead of someone or something else substitute for somebody/something Nothing ...

to take the place of somebody/something else; to use somebody/something instead of somebody/something else.

a person or thing that you use or have instead of the one you normally use or have; a meat substitute; a substitute family substitute for somebody/something.

There are 18 meanings listed in OED's entry for the verb substitute, three of which are labelled obsolete. See 'Meaning & use' for definitions, usage, and ...

​an act of using one person or thing in the place of another. Two substitutions were made during the game. substitution of A for B the substitution of ...

a teacher employed to do the work of another teacher who is away because of illness, etc. Questions about grammar and vocabulary?

​a teacher employed to do the work of another teacher who is away because of illness, etc. Join us. Join our community to access the latest language ...

SUBSTITUTE definition: 1. to use something or someone instead of another thing or person: 2. to perform the same job as…. Learn more.

At an informal level, one good or service is a substitute for another if it can be used to satisfy the same need, or at least a similar need.