echo
     n 1: the persistence of a sound after its source has stopped
          [syn: {reverberation}, {sound reflection}, {replication}]
     2: (Greek mythology) a nymph who was spurned by Narcissus and
        pined away until only her voice remained
     3: a reply that repeats what has just been said
     v 1: to say again or imitate; "followers echoing the cries of
          their leaders" [syn: {repeat}]
     2: ring or echo with sound; "the hall resounded with laughter"
        [syn: {resound}, {ring}, {reverberate}]
     3: call to mind; "His words echoed John F. Kennedy" [syn: {recall}]
     [also: {echoes} (pl)]
Source: WordNet® 2.0

echo [FidoNet] n. A {topic group} on {FidoNet}'s echomail system.
   Compare {newsgroup}.


Source: The Jargon File

ECHO
     European Community Host Organisation (org., Europe)
     
     
Source: Virtual Entity of Relevant Acronyms