earlier -
(comparative and superlative of `early') more early than; most early; "a fashion popular in earlier times"; "his earlier work reflects the influence of his teacher"; "Verdi's earliest and most raucous opera"
early at or near the beginning of a period of time or course of events or before the usual or expected time; "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"
Adverb
earlier -
earlier in time; previously; "I had known her before"; "as I said before"; "he called me the day before but your call had come even earlier"; "her parents had died four years earlier"; "I mentioned that problem earlier"