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

1. race
2. nationality
3. ethnicity
4. clan
5. by extension, social group (e.g. office workers 上班族)