[syn: casually, nonchalantly]
The Collaborative International Dictionary of English v.0.48:
Nonchalantly \Non"cha*lant`ly\, adv.
   In a nonchalant, indifferent, or careless manner; coolly.
   [1913 Webster]
WordNet (r) 3.0 (2006):
nonchalantly
    adv 1: in a composed and unconcerned manner; "without more ado
           Barker borrowed a knife from his brigade Major and honed
           it on a carborundum stone as coolly as a butcher" [syn:
           coolly, nervelessly, nonchalantly]
    2: in an unconcerned manner; "glanced casually at the headlines"
       [syn: casually, nonchalantly]