As a Noun: 1. A communication which says that something is definitely true or which says that an arrangement or an appointment that has already been agreed on is definite. English = confirmation. 2. The formal agreement with a plan or an idea given by someone in a position of authority. English = approval. 3. The formal agreement with a plan or an idea, especially a motion that has been presented to a meeting. English = adoption. As a Verb or Adjective: 1. To show or say something is definitely true; to say that an arrangement or an appointment is definite. English = confirm. 2. Of an idea, agreement or plan, to be firm and clear, and to be unlikely to be changed. English = (be) definite. 3. To formally agree with a plan or an idea, if you are in a position of authority, and say that it can happen. English = approve. 4. To formally agree with a plan or an idea, especially a motion that has been presented to a meeting. English = adopt.