Heard

• (imp. & p. p.) of Hear • imp. & p. p. of Hear.
Found on http://thinkexist.com/dictionary/meaning/heard/

heard

adjective detected or perceived by the sense of hearing; `a conversation heard through the wall`
Found on https://www.encyclo.co.uk/local/20974

Heard

Heard (hẽrd), imperfect & past participle of Hear .
Found on http://www.encyclo.co.uk/webster/H/22

heard

[adj] - detected or perceived by the sense of hearing
Found on http://www.webdictionary.co.uk/definition.php?query=heard