If your friend is acting cool, unconcerned or in an indifferent manner, call him nonchalant — like when he saunters by a group of whispering, giggling girls and just nods and says, "Hey." Definition: "Nonchalant" is an adjective describing someone who appears calm, relaxed , and does not show anxiety, interest, or enthusiasm, even in situations where most people might react. It is usually used in a formal context but sometimes appears in casual conversations. What does it mean when someone is nonchalant? Someone who is nonchalant is relaxed and calm , either because they do not care about something or because they are not worried about something. NONCHALANT meaning: relaxed and calm in a way that shows that you do not care or are not worried about anything
