What is the meaning of Nonchalant?

Casually calm and relaxed.

Indifferent; unconcerned; behaving as if detached.

nonchalant, offhand

nonchalantly, offhandedly

careless, showing no interest or effort

Marked by a lack of vivacity, vigour, liveliness; slow-moving; indolent

Cool, relaxed

nonchalant

nonchalant

nonchalant

Source: wiktionary.org