1. To dispatch someone or something to a lower level, position, or location to retrieve, receive, or accomplish something. In this usage, a noun or pronoun is used between "send" and "down." Send the intern down for some more coffee, would you? The printer is acting up again. We'll have to send it down for repairs.

2. To dispatch someone or something to a southerly or less central location to retrieve, receive, or accomplish something. In this usage, a noun or pronoun is used between "send" and "down." We're going to send you down to Texas for a shipment of goods coming up from Mexico. The police officer sent the suspect down for booking at the county courthouse.

3. To order food, drinks, or other items through room service in a hotel. I don't really feel like leaving the room again after such a long journey. Why don't we just send down for something instead? Tom, would you mind sending down for some fresh towels?

4. To suspend or dismiss (someone) from a university for some reason. In this usage, a noun or pronoun can be used between "send" and "down," though it is often used in passive constructions. Primarily heard in UK. The two students were sent down for their participation in the prank.