Nonchalant meaning
Without warmth or enthusiasm; showing cool lack of concern; casually indifferent.
adjective
Casually unconcerned or indifferent.
adjective
The definition of nonchalant is not showing interest.
An example of nonchalant is the response "whatever."
adjective
He is far too nonchalant about such a serious matter.
adjective
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Origin of nonchalant
- French from Old French present participle of nonchaloir to be unconcerned non- non- chaloir to cause concern to (from Latin calēre to be warm, heat up kelə-1 in Indo-European roots)
From American Heritage Dictionary of the English Language, 5th Edition
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From Wiktionary