frettus Save DMLBS 1 frettus v. 2 fretta 2 frettus , decorated w. fretwork: a (of garment); b (arch.). a 1315 casula alba ~a de albo cum pallio albo de simplice aurifrigio Invent. Ch. Ch. 66. b altitudo volte ~e archuate usque ad cooperturam plumbi (W. Worc.) Camb. Antiq. Soc. 4° S. IX 43.