Abhor is a form of verb. The meaning of abhor is 'to hate very much or regard with hatred'. The synonyms of Abhor are 'detest' and 'abominate'. The meaning of abhor usually depicts a strong form of hatred.
The following sample usage will make the meaning of abhor more clear.
1. I abhor cruelty towards animals.
2. He is rude and mannerless so I abhor talking to him.
3. Each and every person in the family abhor his decisions.