Quarterly Update 18, Fall 2019
| Headword | Part of Speech | Update Type |
| blind mosquito | n | Revised Entry |
| chill bumps | n pl | Revised Entry |
| Chinese apple | n | Revised Entry |
| Chinese handball | n | Revised Entry |
| chips | exclam | New Entry |
| chizzywink | n | Revised Entry |
| choose | v | Revised Sense |
| chowy | adj | Revised Entry |
| chunkhead | n | Revised Entry |
| Indian apple | n | Revised Sense |