Echo/ˈekəʊ/ Definition 1 of 6Pro Tip 1/2Natural Settings The word 'echo' is often used to describe sounds in large, open or empty spaces. The mountainside was filled with the echo of the yodeler's voice. Pro Tip 2/2Creepy Ambiance 'Echo' can imply a spooky or lonely atmosphere in storytelling. An eerie echo was all that could be heard in the abandoned castle.