1.(做某事或某事发生的)最早日期, 最早时间
The earliest I could start would be 1 October.我最早能在10月1号开始。
2.at the earliest
(not before)最早
The first official results are not expected until Tuesday at the earliest.预计第一份正式结果最早将在星期二公布。
3.at your earliest convenience<正式>(as soon as possible)尽快
We look forward to a reply at your earliest convenience.我们期待您能尽快回复。