substitute - WordReference. com Dictionary of English to put (a person or thing) in the place of another:[~ + object + for + object] We substituted fish for meat several times a week to act as a substitute:[no object] substituting when the regular teachers were sick of or relating to a substitute or substitutes: a substitute teacher
Substitute - definition of substitute by The Free Dictionary substitute - put in the place of another; switch seemingly equivalent items; "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"