noun
person of leisure; idler; person with time on their hands
Formal or literary term for someone who has plenty of free time, often with a nuance of being unoccupied or idle. Can be neutral or slightly negative depending on context.
彼は定年後、すっかり閑人になった。
After retirement, he became a complete man of leisure.
平日の昼間から公園にいるとは、よほどの閑人だな。
Being in the park on a weekday afternoon—you must really have a lot of free time.