n.standard time in the 5th time zone west of Greenwich, reckoned at the 75th meridian; used in the eastern United States
同义词：Eastern TimeEastern Standard TimeEST
英汉双解大词典
est/ɛst/
1.
N（名词）
a treatment intended to help people towards psychological growth, in which they spend many hours in large groups, deprived of food and water and hectored by stewards 一种心理疗法，患者被安置在群体里，经历无水和食物供应及监管训斥等磨练使其心理逐渐成熟