Nonchalant definition: coolly unconcerned, indifferent, or unexcited; casual .. See examples of NONCHALANT used in a sentence. NONCHALANT definition: 1. behaving in a calm manner, often in a way that suggests you are not interested or do not care…. Learn more. 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. 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.
