What does non significant pac with aberrancy and non significant taccycardia signify on holter monitor results mean?

PAC stands: For premature atrial contractions. Aberrancy probably means conduction abnormality. Tachycardia means rapid heart rate >100. Both of these are "non-significant" so they probably are not significant. But its significance would depend on why you were getting the holter in the first place. Ask your doctor for specific recommendation.