Lexical Definition

‎μαρὰν ἀθά‎ maràn athá (mar'-an ath'-ah) Come, Lord! ^{A:V + A:N}
of Chaldee origin (meaning our Lord has come)

Maran-atha.

• maranatha, i.e. an exclamation of the approaching divine judgment

Abbott-Smith

μαρὰν ἀθά (Rec. μαραναθά; Aram.: on the original form v. Dalman, Gr., § 41, 1; 74, 3; Words, 328),
Maran atha, i.e. the Lord cometh (but v. Dalman, Gr., § 41, 1; 74, 3; Words, 328; Field, Notes, 180; ICC, in l.): I Co 16:22.†

Abbott-Smith References