Pronunciation (UK) IPA (key): /ˈsaɪ.nɪ.kjʊə/ or /ˈsɪ.nɪ.kjʊə/ (US) IPA (key): /ˈsaɪ.nə.kjʊr/ or /ˈsɪn.ə.kjʊr/ Audio (UK)(file) Noun Singular sinecure Plural sinecures (countable) A sinecure is a position that requires little to no work but still gives a good payout.Wikiwand - on Seamless Wikipedia browsing. On steroids.Remove ads