TIP SLIGHTLY can be defined as a four-letter word, 'TILT'. To TILT something means to move it to one side or the other, usually at an angle. It is often used to describe the action of adjusting the angle of something, such as a camera or a chair. It can also be used to describe the action of leaning or shifting one's weight in a certain direction. Tipping slightly can be used to indicate a subtle change in direction or attitude.