dictionary
Definition / Define

• Substitute Verb
  1. To use in place of something else, with the same function.
     • I had no shallots so I substituted onion.
  2. In the phrase "substitute X for Y", to use X in place of Y.
     • I had to substitute new parts for the old ones.
  3. In the phrase "substitute X with/by Y", to use Y in place of X.
     • I had to substitute old parts with the new ones.
  4. To remove (a player) from the field of play and bring on another in his place.
     • He was playing poorly and was substituted after twenty minutes.
  5. To serve as a replacement (for someone or something).
     • Accumulation of wealth by this route may substitute for personal saving.
• Substitute Noun
  1. A replacement or stand-in for something that achieves a similar result or purpose.
  2. A player who is available to replace another if the need arises, and who may or may not actually do so.