preposition

1. Denotes a mingling or intermixing with distinct or separable objects. (See Usage Note at amidst.)

   "How can you speak with authority about their customs when you have never lived among them?"

2. Denotes a belonging of a person or a thing to a group.

   "He is among the few who completely understand the subject."

3. Denotes a sharing of a common feature in a group.

   "Lactose intolerance is common among people of Asian heritage."