To fill full; fill to the utmost capacity, as a vessel, a room, etc.To make full or complete; fill the measure of; bring out or manifest fully.To fill the requirements or purport of; carry out or into effect; bring to consummation; satisfy by performance: as, to fulfil a prayer or petition; to fulfil one's promises or the terms of a contract; the prophecy was fulfilled.To carry on or out fully or completely; perform; execute: as, to fulfil the requirements of citizenship.To fill out; carry on to the end; continue to the close; finish the course of: as, to fulfil an apprenticeship, a term of office, or (archaically) a period of time.