Third-person singular simple present indicative form of reign.(verb)
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Use "reigneth" in a sentence
"O Lord, we beseech thee, let thy continual pity cleanse and defend thy Church, and, because it cannot continue in safety without thy succor, preserve it evermore by thy help and goodness; through Jesus Christ our Lord, who liveth and reigneth with thee and the Holy Spirit, one God, for ever and ever."
"For the Lord God omnipotent reigneth forever, or at least until we find a home."
"Through our Lord Jesus Christ, Thy Son; Who liveth and reigneth with Thee in the unity of the Holy Spirit: God, world without end."