fieri facias Syllabification: (fi·e·ri fa·ci·as)Pronunciation: /ˌfīərē ˈfāSH(ē)əs/Definition of fieri facias noun Law a writ to a sheriff for executing a judgment. Origin: late Middle English Latin, 'you shall make happen'fieri facias in other Oxford dictionaries Definition of fieri facias in the British & World English dictionary