noun Etymology: from the leadsman's call by the ~ for a depth corresponding to the sixth deep on a sounding line Date: 1929 a place of disposal or abandonment
DEEP SIX
Meaning of DEEP SIX in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012