The term 'DREAM STAGE' can be broken down into three crossword solutions: REM, which stands for Rapid Eye Movement, a STAGE of sleep; DREAM, which is an experience of images, ideas, emotions, and sensations that occur involuntarily in the mind during certain stages of sleep; and STAGE, which is a distinct period or step in a process or development. REM sleep is the deepest STAGE of sleep, and it is during this STAGE that most dreaming occurs. During REM sleep, the brain is highly active and the body is temporarily paralyzed. Dreams experienced during REM sleep are often more vivid and memorable than those experienced during other stages of sleep.