Particular definition is rather elusive. It refers to someone who is exceptionally picky and critical. A persnickety individual often be fastidious and has high standards when it comes to standards and flawlessness. Their fastidious nature can be perceived as commendable, but it can also exacerbate extreme criticism and unjustified dissatisfaction. Being persnickety is typically connected with detailed attention to detail but can also be seen as a type of pedantry.
