English Dictionary

echo

verb

(of a sound or sound waves, intransitive) To reflect off a surface and return. / (transitive) To reflect back (a sound). / (by extension, transitive) To repeat (another's speech, opinion, etc.).

I could hear the echo of my voice bouncing off the walls.

意味（1）

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

意味（2）

(transitive) To reflect back (a sound).

Those peals are echoed by the Trojan throng.

意味（3）

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

Some poems, echoing the purpose of early poetic treatises on scientific principles, attempt to elucidate the mathematical concepts that underlie prime numbers. Others play with primes’ cultural associations. Still others derive their structure from mathematical patterns involving primes.

意味（4）

(computing, transitive) To repeat its input as input to some other device or system.

The device that is to echo the characters should be optioned for echoplexing.

意味（5）

(intransitive, whist, bridge) To give the echo signal, informing one's partner about cards one holds.