1. To state or to assume something as pre-existing during an argument: Henry premised his speech with the idea that everyone wants to have a job and to be able to take care of themselves economically.

Sam, do you mean to premise that the bank lied to us about the amount of funds in our account?

2. To provide an explanation before the main contents: The author premised his readers with an introductory note to explain the purpose of his book.
3. Etymology: from Latin praemittere "to send or to put before"; from prae-, "before" + mittere, "to send".