- a Minor Prophet of the 5th century b.c.
- the book of the Bible bearing his name. Abbreviation: Mal.
noun Old Testament
- a Hebrew prophet of the 5th century bc
- the book containing his oraclesDouay spelling: Malachias (ˌmæləˈkaɪəs)
masc. proper name, Old Testament name of the last in order of the Twelve Prophets, from Hebrew Mal’akhi, literally “my messenger,” from mal’akh “messenger,” from Semitic base l-‘-k (cf. Arabic la’aka “he sent”).