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.
(fÄ­l'tÉr) 1  A material that has very tiny holes and is used to separate out solid particles contained in a liquid or gas that is passed through it. 2  A device that allows signals with certain properties, such as signals lying in a certain frequency range, to pass while blocking the passage of others.