Definition of all-holy in English:

all-holy

Pronunciation /ˌɔːlˈhəʊli/

adjective

  • Entirely or infinitely holy. Also as noun: an entirely or infinitely holy person or thing; (now only) specifically (with the) God.

    "all-holy church" noun rare after 16th cent. = "holy church".

Origin

Old English; earliest use found in The Paris Psalter. From all + holy.