'Stiffly' definitions:

Definition of 'stiffly'

From: WordNet
adverb
In a stiff manner; "his hands lay stiffly" [syn: stiffly, stiff]
adverb
In a rigid manner; "the body was rigidly erect"; "he sat bolt upright" [syn: rigidly, stiffly, bolt]

Definition of 'Stiffly'

From: GCIDE
  • Stiffly \Stiff"ly\, adv. In a stiff manner. [1913 Webster]