An 83rd birthday party for Hilldale Nursing Home resident Abraham Porter stretched the definition of the word 'party' Monday. 'Yes, there was food and music and gifts and people gathered for the purpose of celebrating, so, technically, it was a party,' said Lydia Marks, the ailing Porter's great-grand-niece. 'But it felt like something else altogether.' The highlight of the affair, Marks said, was when Porter recognized his only son. 