A "Sapna" or dream is a series of thoughts, images, and sensations that occur in a person's mind during sleep. Dreams can vary widely in content, ranging from realistic scenarios to fantastical adventures. They often reflect a person's emotions, experiences, and subconscious thoughts, making them a fascinating subject of study in psychology and neuroscience. In many cultures, including those influenced by Hinduism, dreams are considered significant and may hold spiritual or prophetic meanings. People often interpret their dreams to gain insights into their lives or to understand their desires and fears better. The study of dreams is known as oneirology.