1.
[syn: casual, insouciant, nonchalant]
The Collaborative International Dictionary of English v.0.48:
Nonchalant \Non`cha`lant"\, a. [F., fr. non not (L. non) +
chaloir to concern one's self for, fr. L. calere to be warm,
to be inflamed with desire, to be troubled. See Non-, and
Caldron.]
Indifferent; careless; cool.
[1913 Webster]
WordNet (r) 3.0 (2006):
nonchalant
adj 1: marked by blithe unconcern; "an ability to interest
casual students"; "showed a casual disregard for cold
weather"; "an utterly insouciant financial policy"; "an
elegantly insouciant manner"; "drove his car with
nonchalant abandon"; "was polite in a teasing nonchalant
manner" [syn: casual, insouciant, nonchalant]