substitute

1 substitute /ˈsʌbstəˌtuːt/ Brit /ˈsʌbstəˌtjuːt/ noun
plural substitutes
1 substitute
/ˈsʌbstəˌtuːt/ Brit /ˈsʌbstəˌtjuːt/
noun
plural substitutes
Britannica Dictionary definition of SUBSTITUTE
[count]
1 
: a person or thing that takes the place of someone or something else — often + for
2 
sports : a player who takes the place of another player during a game

— substitute

adjective, always used before a noun
2 substitute /ˈsʌbstəˌtuːt/ Brit /ˈsʌbstəˌtjuːt/ verb
substitutes; substituted; substituting
2 substitute
/ˈsʌbstəˌtuːt/ Brit /ˈsʌbstəˌtjuːt/
verb
substitutes; substituted; substituting
Britannica Dictionary definition of SUBSTITUTE
1 
[+ object] : to put or use (someone or something) in place of someone or something else
— often + for
2 
[no object] : to do the job of someone else or serve the function of something else
— often + for
3 
[+ object] : to replace (one person or thing) with another — often used as (be) substituted