Echo (genus) definition

(1) The persistence of a sound after its source has stopped

(2) A reply that repeats what has just been said

(3) (Greek mythology) a nymph who was spurned by Narcissus and pined away until only her voice remained

(4) To say again or imitate

"Followers echoing the cries of their leaders"

(5) Ring or echo with sound

"The hall resounded with laughter"

(6) Call to mind

"His words echoed John F. Kennedy"