1echo 
/ˈɛkoʊ/ noun
plural ech·oes /ˈɛkoʊ/ noun [count] 1 : a sound that is a copy of another sound and that is produced when sound waves bounce off a surface (such as a wall)
▪ We shouted into the canyon and listened to the echo of our voices. ▪ the echo of footsteps in the hall ▪ faint echoes 2 a : something (such as a feature or quality) that repeats or resembles something else
▪ His work contains echoes of older and greater poets. ▪ The book's title is an echo of a line from an old folk song.
b : something that is similar to something that happened or existed before
▪ The crime is a chilling echo of the murders that shocked the city two years ago.
▪ We shouted into the canyon and listened to the echo of our voices. ▪ the echo of footsteps in the hall ▪ faint echoes
▪ His work contains echoes of older and greater poets. ▪ The book's title is an echo of a line from an old folk song.
b : something that is similar to something that happened or existed before
▪ The crime is a chilling echo of the murders that shocked the city two years ago.
