Noah Webster's Dictionary 1. (adv.) Piously; with sanctity; in a holy manner. 2. (adv.) Sacredly; inviolably.

Multi-Version Concordance Holily (1 Occurrence) 1 Thessalonians 2:10 Ye are witnesses, and God also, how holily and justly and unblameably we behaved ourselves among you that believe: (KJV ASV WBS)