Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
trend-setter is a noun meaning "someone who popularizes a new fashion". It carries one recorded sense.
someone who popularizes a new fashion
Definitions, synonyms and semantic relations for trend-setter come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.