Definition of hallow:
"1777: Then away they went from merry Sherwood / And into Yorkshire he did hie / And the King did follow, with a hoop and a hallow / But could not come him nigh. -- Robin Hood's Chase, reprinted in"
"1847: Come hallow the goblet with something more true
Than words we forget in a minute. --"
(adj) :
alternative spelling of
hollow
"1902:"If the sun were a hallow sphere of its present size and the earth were placed at the center, the moon could [...]. Such a hallow sphere would hold more than a million balls the size of the earth." —"