"earliest" in the adjective sense
1. early
at or near the beginning of a period of time or course of events or before the usual or expected time
"a fashion popular in earlier times"
"his earlier work reflects the influence of his teacher"
"Verdi's earliest and most raucous opera"
"early morning"
"an early warning"
"early diagnosis"
"an early death"
"took early retirement"
"an early spring"
"early varieties of peas and tomatoes mature before most standard varieties"
2. early
being or occurring at an early stage of development
"in an early stage"
"early forms of life"
"early man"
"an early computer"
3. early, former, other
belonging to the distant past
"the early inhabitants of Europe"
"former generations"
"in other times"
4. early
very young
"at an early age"
5. early
of an early stage in the development of a language or literature
"the Early Hebrew alphabetical script is that used mainly from the 11th to the 6th centuries B.C."
"Early Modern English is represented in documents printed from 1476 to 1700"
6. early
expected in the near future
"look for an early end to the negotiations"
"earliest" in the adverb sense
1. soonest, earliest
with the least delay
"the soonest I can arrive is 3 P.M."
Source: WordNet® (An amazing lexical database of English)
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