A reflected sound that is heard again by its initial observer.

An utterance repeating what has just been said.

A device in verse in which a line ends with a word which recalls the sound of the last word of the preceding line.

(of a sound or sound waves) To reflect off a surface and return.

To reflect back (a sound).

(by extension) To repeat (another's speech, opinion etc.).

“Sid echoed his father's point of view.”

The visual image formed by an echocardiograph.

The use of ultrasound to produce images of the heart.