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: for, substitute
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

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: for, 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: for, substitute
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
During the 2014-15 school year, Tacoma focused on recruiting emergency substitutes for last-minute vacancies and now operates with 140 emergency substitutes out of a pool of 362 certified substitutes.
They host paid orientation sessions to prepare substitutes for the classroom and hold recognition programs that award "Substitute Teacher of the Year" across districts and states.
Key clinical point: Availability of autologous engineered skin substitutes for treatment of extensive, deep burns may reduce time to wound closure, long-term morbidity, and mortality.
I simply open the app to find substitutes for eggs, buttermilk, cottage cheese, etc.
Rivalry occurs among health care providers whose services are close substitutes for each other, especially when one provider acts to improve its standing or protect its position.
Substitutes for different systems are as varied as the resources within each system.
The copper-graphite composite alloys appear to be promising substitutes for currently used lead copper alloys and represent future foundry products.
Possible substitutes for cadmium in pigments include not only organic compounds but inorganics such as iron oxide and nickel-antimony titanates.
The effectiveness of salt substitutes for the treatment of diuretic-induced hypokalemia shown in this study is similar to that seen in two previous reports.
In the wake of last week's international agreement to dramatically cut the use of chlorofluorocarbons (CFCs), the world's $2.2 billion CFC-production industry is scrambling to find substitutes for these chemicals, which are used in refrigeration, foam production and the cleaning of electronic parts.
Districts can purchase the SubSkills online training course for their substitutes for $29.95 per sub, or ask substitute teachers to purchase the course for $39.95, Smith says.
Nonasbestos substitutes for the five products initially banned under this proposal would cost an estimated $1.8 billion -- or less than $10 per consumer over 15 years, EPA says.
The advanced Internet-telephone systems make it easier for a teacher to call in and manage absences, as well as help prepare substitutes for that day's lesson plan.