Persnicketiness definition of persnicketiness by The Free Demanding definition is somewhat hard to grasp. It refers to someone who is exceptionally selective and nitpicking. A persnickety individual typically be fastidious and sets the bar high when it comes to criteria and perfection. Their meticulousness can be regarded as praiseworthy, but it can also magnify unreasonable criticism and unjustified dissatisfaction. Being persnickety is frequently connected with exact attention to detail but can also be seen as a type of pedantry.