The Collaborative International Dictionary of English v.0.48:
Gladly \Glad"ly\, adv. [From Glad, a.] [1913 Webster] 1. Preferably; by choice. [Obs.] --Chaucer. [1913 Webster] 2. With pleasure; joyfully; cheerfully; eagerly. [1913 Webster] The common people heard him gladly. --Mark xii. 37. [1913 Webster]WordNet (r) 3.0 (2006):
gladly adv 1: in a willing manner; "this was gladly agreed to"; "I would fain do it" [syn: gladly, lief, fain]