The term 'black out' can be defined as a variety of different actions, such as darkening, expunging, covering, concealing, eclipsing, erasing, fainting, censoring, preventing, squelching, zoning out, and zonking out. These actions all involve obscuring or hiding something from view, either physically or metaphorically. For example, darkening could refer to dimming the lights in a room, while expunging could refer to deleting a file from a computer. Covering could mean placing a cloth over an object, while concealing could mean hiding something away. ECLIPSE could refer to blocking out the sun, while erasing could mean wiping away a message. Fainting could refer to losing consciousness, while censoring could refer to removing certain words from a text. Preventing could mean stopping something from happening, while squelching could refer to suppressing a sound. Zoning out and zonking out could refer to daydreaming or losing focus.