substitute /ˈsʌb.stɪ.tʃuːt/verb 5noun 5forms 4 verb5 •To use in place of something else, with the same function.I had no shallots so I substituted onion. •To use X in place of Y.I had to substitute new parts for the old ones. •To use Y in place of X; to replace X with Y.I had to substitute old parts with the new ones. •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 •To serve as a replacement (for someone or something).Accumulation of wealth by this route may substitute for personal saving. — 1987 noun5 •A replacement or stand-in for something that achieves a similar result or purpose.Ladies [in William Shakespeare's age], again, universally wore masks as the sole substitute known to our ancestors for the modern parasol; a fact, perhaps, not generally known. — 1840 •A substitute teacher. •A player who is available to replace another if the need arises, and who may or may not actually do so.Dean Whitehead opened the scoring shortly after the break with a low finish and substitute Peter Crouch sealed the win with a tap-in. — 2011 •(historical) One who enlists for military service in the place of a conscript. •Abbreviation of substitute good. formssubstituted · substituting · substitutes · substituteth