As a Noun: 1. Ideas that you have in your mind or the act of having an idea or ideas in your mind. English = thoughts, thinking. Formal English = cogitation, cogitations. 2. The part of your mind that tells you whether what you are doing is right or wrong. English = conscience. As a Verb or Adjective: 1. To use your mind to form opinions, ideas or images of something; to think at length, in depth or repeatedly. 2. To remember or be aware of what other people want, need, or feel. English = (be) thoughtful. 3. To be very careful to do your work properly. English = (be) conscientious.