In care of someone
Meaning: write to one person at the address of another, used to give someone the address where you can be contacted when you are staying away from home
Example: You can write me in care of my grandmother. I’m staying at Tom’s house. Write to me in care of Tom Gray, Chicago, Illinois.
Example: You can write me in care of my grandmother. I’m staying at Tom’s house. Write to me in care of Tom Gray, Chicago, Illinois.