The term 'USE THE OVERHEAD COMPARTMENT' can be summarized by the word 'STOW', which is a four letter word. STOW means to put something away in a secure place, usually for storage or safekeeping. In this case, it is referring to putting items away in the overhead compartment of an airplane. This is important to do for safety reasons, as items that are not properly stowed can become projectiles during turbulence.