substitute for (someone or something)

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substitute for (someone or something)

1. To act as a substitute for someone or something. I'm substituting for Eric for the next few days while he recovers in the hospital. Don't believe anyone who tries to convince you that low-fat cooking sprays can substitute for real butter or olive oil and not taste any different.
2. To use, employ, or instruct someone or something to act as a substitute for someone or something else. In this usage, a noun or pronoun is used between "sub" and "for." With a healthy 30-point lead, the coach substituted the rookie for the star quarter back to give him some experience on the field. Let's try substituting an AC motor for the DC one we've been using and see if that improves the results.
See also: substitute

substitute someone for (someone else)

 and substitute something for something else
to exchange someone or something for someone or something else; to replace someone or something with someone or something else. Shall I substitute Fred for Mary in the front office? Please substitute fish for beef on my dinner order.
See also: substitute

substitute for someone or something

to serve as a replacement for someone or something. I have to substitute for Roger at work this weekend. Do you think that this will substitute for the one you wanted?
See also: substitute
References in classic literature ?
On that day the Philadelphia iron-forger then believed himself victorious, and could not evince contempt enough for his rival; but when the other afterward substituted for conical shot simple
Our own flags should be substituted for those of the enemy, and the chariots mingled and used in conjunction with ours.
One study from Spain, compared two diets--one a normal Mediterranean diet, another the same diet but with walnuts substituted for some of the olive oil and other high fat foods.
The walnuts were substituted for other high-fat foods like meat and fat.
influence the specific substitution made, if an item was substituted for
Assume, for example, that the gross profit tax base found in the VAT were extracted and substituted for the present U.S.
Though semimetallic materials have been substituted for asbestos in front disk brakes, they provide less traction when new.