What is Care ?
Care is (noun) 1. serious attention He handled the glass with great care. to take care to be very careful Take care when you cross the road. He took great care with the box of glasses. Take care not to be late. 2. care of (on a letter.) words to show that the person is living at the address, but only as a visitor Mr Brown, care of Mrs Green to Mr Brown at the address of Mrs Green 3. looking after someone the care of the elderly to take care of someone to look after someone Will you take care of mother while I’m away?(verb) to be worried I don’t care if my car is dirty. She cares a lot about the environment. he couldn’t care less does not worry at all about something
source: Easier English, Student Dictionary Upper Intermediate Level