Definition of "six"

In Austria the prisoners rise at five, [...]. There are morning prayers at a quarter to six, after which the prisoners are conducted to work.

1838, Francis Bisset Hawkins, chapter XIII, in Germany: The Spirit of Her History, Literature, Social Condition and National Economy, Illustrated by Reference to Her Physical, Moral and Political Statistics, etc.‎, page 228

Just as having an enemy on your “six” is the hardest situation to escape, being on an enemy at six o'clock is the surest kill. Fighter pilots are always practicing maneuvers to get out from having another aircraft on their six.

2009, Bill Yenne, Aces High: The Heroic Saga of the Two Top-scoring American Aces of World War II, Penguin, page 98

England required 15 from the last over of the regular match. Ben Stokes hit a six and benefited when a throw from the deep hit him and went for four overthrows.

2019 July 14, Stephan Shemilt, “England win Cricket World Cup: Ben Stokes stars in dramatic finale against New Zealand”, in BBC Sport‎, London