unhallow verb1 •To rended un-hallowed, i.e. to profane; to desecrate.Nay, the very Ostentation of the Thorn, is a Weakness, and I might have said a Vice too; for the Vanity Unhallows the very Virtue, especially where it is Accompany'd with Detraction. — 1692 formsunhallowed · unhallowing · unhallows