Uses Thus, Definition and 5 Example Sentences Thus is defined as in a certain way or therefore. Thus usually refers to the past. It is often used to indicate a conclusion. Example Sentences I was thirsty thus I fell asleep. Thus, the angry statesman was generally not successful in conquest. Thus they decided it was absolutely innocent. I was enthusiastic about cinema thus I wanted to be an actor. Thus, an ethical problem still exists, and cigarette producers should not be allowed in target global markets.