HALLOW.To hallow is either to make holy or to regard as holy. Both meanings are very old. Thus Wyclif translates Joh_17:17 Halwe thou hem in treuthe, and Deu_32:51 Ye halwide not me amonge the sones of Yreal (1388. Israel). In the Lords Prayer (Mat_6:9, Luk_11:2, the only places where hallow occurs in the NT) the meaning is regard as sacred. All the Eng. versions have hallowed in these verses except the Rhemish (Rom. Cath.), which has sanctified; but in the modern editions of this version the change has been made to hallowed.
Hastings' Dictionary of the Bible
Edited by James Hastings, D.D. Published in 1909
Hallow
(קָדִשׁ, in Piel; ἀγνιάζω, to render sacred, set apart, consecrate (Exo_28:38; Exo_39:1; Lev_22:2; Num_5:10). The English word is from the Saxon, and is properly to make holy; hence hallowed persons, things, places, rites, etc.; hence also the name, power, dignity of God is hallowed, that is, reverenced as holy (Mat_6:9). SEE HOLY.
CYCLOPEDIA OF BIBLICAL, THEOLOGICAL AND ECCLESIASTICAL
press 1895.