persnickety adj meanings etymology and more Particular importance is rather elusive. It refers to someone who is immensely particular and judgmental. A persnickety individual frequently be fastidious and has high standards when it comes to expectations and excellence. Their attention to detail can be regarded as praiseworthy, but it can also magnify unwarranted censure and superfluous dissatisfaction. Being persnickety is frequently connected with precise attention to detail but can also be seen as a form of perfectionism.