'Stealthily' definitions:

Definition of 'stealthily'

From: WordNet
adverb
In a stealthy manner; "stealthily they advanced upstream"

Definition of 'Stealthily'

From: GCIDE
  • Stealthily \Stealth"i*ly\ (-[i^]*l[y^]), adv. In a stealthy manner. [1913 Webster]