Here are some examples of how it can be used:
* "She stood defiantly, arms crossed, refusing to back down." This shows the person is refusing to yield or comply.
* "The protesters marched defiantly through the streets, chanting slogans." This shows the protesters are acting in a way that opposes authority or rules.
* "He spoke defiantly to the judge, denying any involvement in the crime." This shows the person is confidently rejecting the accusations.
Note: Be careful not to confuse "defiantly" with "definitely," which means "without any doubt."