Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
long-lasting is an adjective meaning "existing for a long time". It carries one recorded sense.
existing for a long time
“hopes for a durable peace”
“a long-lasting friendship”
Definitions, synonyms and semantic relations for long-lasting come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.