1. (

• substitute ,
• replace ,
• interchange ,
• exchange ,

) put in the place of another; switch seemingly equivalent items; "the con artist replaced the original with a fake Rembrandt"; "substitute regular milk for fat-free milk"; "synonyms can be interchanged without a changing the context's meaning" ;

2. (

• substitute ,
• sub ,
• stand_in ,
• fill_in

) be a substitute; "The young teacher had to substitute for the sick colleague"; "The skim milk substitutes for cream;

3. (

• substitute ,
• deputize ,
• deputise ,
• step_in ,

) act as a substitute; "She stood in for the soprano who suffered from a cold" ;

1. (

• utility ,
• substitute ,

) capable of substituting in any of several positions on a team; "a utility infielder" ;

2. (

• alternate ,
• alternative ,
• substitute

) serving or used in place of another; "an alternative plan" ;

3. (

• ersatz ,
• substitute

) artificial and inferior; "ersatz coffee"; "substitute coffee" ;