pin-drop adjective 2noun 2forms 4 adjective2 •Of or relating to the sound a pin makes when dropping.Then Harrow made an announcement in a voice loud enough to freeze the deputies in their motion, and to bring the various cameras and microphones his way again. [...] Pin-drop silence. — 2010 •Small or inconsequential.There were poems compiled in Havering library, or in my 'pin-drop' study, according to a Poeclectic gameplan — 2002 noun2 •The sound of a small metal pin dropping onto the ground or a floor; notable because a falling pin makes almost no sound when it hits the ground except for when a setting is so quiet that even the smallest, negligible noise would be noticeable.Like a pin-drop in a deep ocean, the news of Amos Tutuola's death came quite unceremoniously to Nigerians early this week. His passage became almost unnoticed [...] — 1999 •A small increment or amount.He made two preparations: one pin-drop of blood on one slide, and a lump the size of a pea spread thin on another. — 1940 formspin drops · pin-drops · more pin-drop · most pin-drop