A website is a presence on the World Wide Web. As of 2017, there are more than one billion. To qualify as a bona fide site, it must be available over the Internet around the clock.
Tube means a hollow cylinder. An example of a tube is manicotti pasta. The definition of a tube is a pliable container with a screw cap at one end to keep it closed. An example of tube is the container that toothpaste comes in.
Definition of pipe for Students. 1 : a long tube or hollow body for carrying a substance (as water, steam, or gas) the exhaust pipe of a car underground water pipes. 2 : a musical instrument or part of a musical instrument consisting of a tube (as of wood or metal) played by blowing or having air passed through it.