ex ante Syllabification: (ex an·te)Pronunciation: /ˈeks ˈantē/Definition of ex ante adjective & adverb based on forecasts rather than actual results: [as adjective]:this is an ex ante estimate of the varianceOrigin:modern Latin, from Latin ex 'from, out of' + ante 'before'ex ante in other Oxford dictionaries Definition of ex ante in the British & World English dictionary