What is definition of persnickity?

The word "persnickety" means someone who is overly concerned with minor details and is very particular or fussy. It's often used to describe someone who is excessively meticulous, nitpicky, or picky about small things. This word can be both positive or negative, depending on the context in which it is used. A persnickety person may be praised for their attention to detail, but they may also be criticized for being too demanding or difficult to work with.