1. A computer on a network (ie. on the Internet)
  2. A hosted service (ie. a website or game daemon) hosted on a server. Hosting may refer to holding and handling digital content.
  3. A hostname; a DNS A / AAAA record.
  4. As broader, non-computer term it means “something which contains a service for another”. For example seen in some Science Fiction series where an animal (more specific, a parasite) is hosted in a human or human-like being.

TakeDown.NET -> “Host