To make something full; to occupy the whole of a space or container. She filled the glass with water.
To supply with a necessary item or items. The store filled the order within two days.
To occupy a position or role. He was chosen to fill the vacant position.
To complete a form or document by providing required information. Please fill out the application form.
To become full or to cause something to become full. The room filled with smoke.
To cause (someone or something) to experience or be permeated by a particular emotion or quality. The inspiring speech filled the audience with hope.