substituting Meaning, Definition & Usage

1. noun working as a substitute for someone who is ill or on leave of absence
   subbing.
   
2. verb put in the place of another; switch seemingly equivalent items
   interchange; exchange; substitute; replace.
   
   • the con artist replaced the original with a fake Rembrandt
   • substitute regular milk with fat-free milk
   • synonyms can be interchanged without a changing the context's meaning
3. verb be a substitute
   fill in; stand in; sub; substitute.
   
   • The young teacher had to substitute for the sick colleague
   • The skim milk substitutes for cream--we are on a strict diet
4. verb act as a substitute
   step in; deputize; substitute; deputise.
   
   • She stood in for the soprano who suffered from a cold

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