What does transubstantiation mean in the context of the Lord's Supper?

In contrast to the belief in transubstantiation, which asserts that the bread and wine in the Lord's Supper literally transform into the body and blood of Christ, historic Reformed theology teaches that these elements are symbolic. The bread and wine signify the true body and blood of Christ, and their consumption represents faith in Him, not a physical change. This understanding emphasizes the importance of the Lord's Supper as a means of grace, where believers express their faith in the sufficiency of Christ's sacrifice for their salvation.