Language: en
Meaning: (idiomatic)To have anextremelysensitivesenseofhearing.1855,Thomas Bulfinch,Bulfinch's Mythology: The Age of Fable, ch. 31 "Northern Mythology",Heimdall is the watchman of the gods. . . . So acute is his ear that no sound escapes him, for he can evenhear the grass growand the wool on a sheep's back.; (idiomatic)To hear very well due to being in anexceptionallyquietenvironment.2005August 28, Tony Francis, “St Neots dreams dashed along the road to Cup final”, intelegraph.co.uk, retrieved 1 Aug. 2008:A suburban arena that was so sepulchral you couldhear the grass grow.; (idiomatic)To be veryawareordiscerning; topay attentionto every smalldetail.1995, Hans-Peter Schwarz,Konrad Adenauer: a German politician and statesman, Berghahn Books,→ISBN, page397:He was quick to appreciate Blankenhorn's engaging personality and intelligent use of his skills. Chief among these was a remarkable ability to keep track of developments—to ‘hear the grass grow’.
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