Describing the state of near-invisibility for a product or service that is so common it is taken for granted. With the exception of a few rural areas, mail service, electricity, indoor plumbing, and refrigerators are all ubiquitous in the United States. In 1940, radios were not ubiquitous. At Rice, wireless connectivity was not ubiquitous at the turn of the century (2000), but it might be ubiquitous in 2006 or 2007.