Lever/ˈlevər/ Definition 1 of 3Pro Tip 1/3Physical Object The word 'lever' as a noun often refers to a physical tool. She used a lever for the wheel nut. Pro Tip 2/3Ease of Action 'Lever' implies making a task easier, especially lifting or moving heavy objects. Insert a lever under the rock to move it effortlessly. Pro Tip 3/3Operational Use In mechanisms, 'lever' can mean a part designed for hand control. Press the lever down to activate the machine.