Pronunciation: (du; Fr. du; Sp. de; Port. di),[key] —prep. from; of (used in French, Spanish, and Portuguese personal names, originally to indicate place of origin): Comte de Rochambeau; Don Ricardo de Aragón.
a prefix occurring in loanwords from Latin (decide); also used to indicate privation, removal, and separation (dehumidify), negation (demerit; derange), descent (degrade; deduce), reversal (detract), intensity (decompound). Cf. di-2, dis-1.
1. Delaware (approved esp. for use with zip code).
2. destroyer escort.
Pronunciation: (du; It.de),[key] —prep. dei (used in Italian names as an elided form of dei): de' Medici.