Persnicketiness definition of persnicketiness by The Free Particular significance is fairly difficult to understand. It refers to someone who is vitally meticulous and disapproving. A persnickety individual usually be fastidious and does not settle for less when it comes to standards and perfection. Their meticulousness can be viewed as laudable, but it can also lead to excessive censure and avoidable dissatisfaction. Being persnickety is frequently linked to detailed attention to detail but can also be seen as a type of obsessiveness.