VHN stands for Village Health Nurse (Tamil Nadu, India), Suggest new definition. Looking for the definition of VHN? Find out what is the full meaning of VHN on Abbreviations. On one quadrant, the baseline (0 day) Vickers hardness number (VHN) was measured and the remaining 3 quadrants were used for microhardness assessment. What is VHN ? There may be more than one meaning of VHN , so check it out all meanings of VHN one by one. VHN See VICKERS HARDNESS NUMBER.