Use 'lordly' to describe someone acting with high self-esteem and authoritative presence, as expected of nobility. Her lordly speech commanded everyone's attention.
Pro Tip 2/3
Slightly Negative
'Lordly' can have a slightly negative tone, suggesting arrogance or condescension when used to describe behavior. His lordly dismissal of the advice showed arrogance.
Pro Tip 3/3
Not Just Wealth
Although lords were historically wealthy, 'lordly' focuses more on behavior and manner than on financial status. Despite his wealth, his modesty was far from lordly.