—used to indicate the earliest possible time when something will happen or be done The job will not be finished until next year at the (very) earliest.

Is it correct to say at earliest?

I think that a polite to neutral way to express the same concept is: as soon as possible, often written as (ASAP). The phrase “at my earliest convenience” isn't inherently impolite. It is, however, somewhat ambiguous, and may be used politely, indifferently, or rudely.

What means earliest time?

the earliest time that something can happen or be done. The earliest we could be there is 7.30. at the earliest: I can get it done by Monday at the earliest. Synonyms and related words.