Definition of think of
1 : to have thoughts about possibly doing (something) She is thinking of applying to grad school. She couldn't think of ever leaving her children.
2 : to use one's mind to form or invent (something) The best plan they could think of was to leave.
3 : to remember (something) I can't think of her name at the moment.
4 : to have a particular kind of opinion about (someone or something) The hiring committee thought highly of her. I wouldn't want you to think badly of me. He thinks the world of his family.
5 : to form or have an idea about (someone or something) People are thinking of her for president. Are you thinking of any place in particular? I am thinking of a number between 1 and 10. I'll be thinking of you in my prayers.
6 : to be concerned about (someone or something) when making decisions about what to do I must think first of my family. She is always thinking of the welfare of others.
7 : to believe that (someone or something) is (a particular type of person or thing) or has (a particular quality) —+ as He thinks of himself as a good writer. I think of you guys as my family.
Seen and Heard
What made you want to look up think of? Please tell us where you read or heard it (including the quote, if possible).