1. old man or woman
2. the elderly
3. one's aged parents or grandparents

1. home
2. family
3. (polite) my (sister, uncle etc)
4. classifier for families or businesses
5. refers to the philosophical schools of pre-Han China
6. noun suffix for a specialist in some activity, such as a musician or revolutionary, corresponding to English -ist, -er, -ary or -ian

classifier: 個