Coaxial refers to something that is arranged in a circular pattern with two or more components having the same center. It can also refer to a type of electrical cable where one conductor surrounds another, forming an inner and outer conductor.
The antenna comes with 16 feet of coaxial cable and rounded easy - twist connectors on each end. (cordcuttingreport.com)
We also have a digital coaxial input which functions similarly with sources that don't support optical. (theheadphonelist.com)
We connected it via the provided digital optical cable directly to a PlayStation 3 and, later, an Xbox 360, since our two Sharp LC - 42SB45U TVs require a sort of break - out cable for coaxial digital audio output. (digitaltrends.com)