Maranatha

(1 Cor. 16:22) consists of two Aramean words, Maran’athah, meaning, “our Lord comes,” or is “coming.” If the latter interpretation is adopted, the meaning of the phrase is, “Our Lord is coming, and he will judge those who have set him at nought.” (Comp. Phil. 4:5; James 5:8, 9.)

an Aramaic or Syriac expression used by St. Paul at the conclusion of his first Epistle to the Corinthians, ch. (1 Corinthians 16:22) signifying "our Lord cometh."

mar-a-nath'-a, mar-an-a'-tha (from Aramaic words, marana' 'athah, "Our Lord cometh, or will come"; according to some, "has come"; to others, "Come!" an invitation for his speedy reappearance (compare Re 22:20); maranatha, or maran atha): Used in connection with anathema, "accursed" (1Co 16:22), but has no necessary connection therewith. It was used by early Christians to add solemn emphasis to previous statement, injunction or adjuration, and seems to have become a sort of watchword; possibly forming part of an early liturgy.