Eastern time
noun
See under standard time.
Also called
Eastern Standard Time.
Origin of Eastern time
An Americanism dating back to 1880–85
British Dictionary definitions for eastern standard time
Eastern Standard Time
noun
one of the standard times used in North America, five hours behind Greenwich Mean Time
one of the standard times used in Australia
Abbreviation:
EST
Scientific definitions for eastern standard time
Eastern Standard Time
Standard time in the fifth time zone west of Greenwich, England, reckoned at 75° west and used, for example, in the eastern part of North America.