Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
1970s is a noun meaning "the decade from 1970 to 1979". It carries one recorded sense.
Definitions, synonyms and semantic relations for 1970s come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.