Noah Webster's New International Dictionary of the English Language

1. (v. t.) To render putrid; to cause to decay offensively; to cause to be decomposed; to cause to rot.

2. (v. t.) To corrupt; to make foul.

3. (v. t.) To make morbid, carious, or gangrenous; as, to putrefy an ulcer or wound.

4. (v. i.) To become putrid; to decay offensively; to rot.