unambitiousEnglishOxford New American Dictionaryunambitious /ˌənamˈbiSHəs, ˌənæmˈbɪʃəs / ▸ adjective not motivated or driven by a strong desire or determination to succeed. ▪ (of a plan or piece of work) not involving anything new, exciting, or demanding. – DERIVATIVES unambitiously /ˌənamˈbiSHəslē, ˌənæmˈbɪʃəsli / adverb,unambitiousness /ˌənamˈbiSHəsnəs, ˌənæmˈbɪʃəsnəs / noun