previously
adv.-
1 at an earlier time (adv.) B1 Intermediateat a time before now or before the period you are talking about.
at a time preceding the current moment or a specified point in the past.
ExampleThe building was previously used as a factory before it became a museum.
ExampleThe candidate had previously served as the city's mayor, a role that provided her with significant experience in urban planning and public policy.
UsageUsually placed before the main verb or at the beginning of a sentence.
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2 recapitulating a series (adv.) B2 Upper Intermediate General-service Theatreused at the start of a TV show to remind you what happened in earlier episodes.
used as an introductory marker in television broadcasting to signal a summary of prior narrative events.
ExamplePreviously on 'The Lost Island', the survivors found a hidden cave.
ExampleThe 'previously on' segment was edited with high-intensity music to remind viewers of the cliffhanger from the season finale.
UsageAlmost exclusively used in the phrase 'Previously on...' followed by the show's title.
From previous + -ly.