To give permission for someone to do something. The teacher allowed the students to leave early.
To let something happen or be done. The new policy allows for more flexibility in the workplace.
To admit or concede something as a fact. He allowed that he might have been mistaken.
To set aside or allocate a specific amount of time, money, or other resource. The itinerary allows two hours for sightseeing.
To make something possible; to enable. The new software allows users to edit videos directly in their browsers.