take care (Verb) — Be careful, prudent, or watchful. ex. "Take care when you cross the street!"
take care (Verb) — Be in charge of or deal with. ex. "She takes care of all the necessary arrangements"
take care (Verb) — Take charge of or deal with. ex. "She took care of this business"
take care (Phrase) — Used to wish someone a good future, esp. in parting or signing off a correspondence.