what is mean by congestion ?

Answer 1

Congestion is a state of excessive accumulation or overfilling or overcrowding. This general definition is broadly correct across all uses of the word. However in specific contexts the word has a more precise definition and usage.

In telecommunication, the term has the following meanings:
In a communications switch, a state or condition that occurs when more subscribers attempt simultaneously to access the switch than it is able to handle, even if unsaturated.
In a saturated communications system, the condition that occurs when an additional demand for service occurs.
Network congestion.

In medicine and pathology the term is used to describe excessive accumulation of blood or other fluid in a particular part of the body, such as nasal congestion.

Answer 2

Because you asked this question under "Mobile Phones", I'll give you the explanation that pertains to Mobility Networks.

It means congestion on the network. If you are in a cell, there is only a certain amount of channels available for phone conversations. Perhaps you are in a car, having a conversation, and driving down the road.
Maybe along the way, there is an accident that causes all the cars to come to a stop. All those other people may also be on phones, having conversations. As you enter that cell, there are already people occupying every available channel with their calls.
Cell networks give priority to users within a cell that already have active phone calls in progress.
So, if you enter the cell and all channels are in use, then you will get dropped, because there isn't another channel available to support your call.
That's congestion.

Answer 3

Congestion is a state of excessive accumulation or overfilling or overcrowding. This general definition is broadly correct across all uses of the word. However in specific contexts the word has a more precise definition and usage.

IS A BLOCKAGE

Answer 4

anything in great numbers that is blocking the normal flow of something.

like lung congestion: phlegm, fluid buildup in the lungs
congestive heart failure: fluid build up in the heart

congestion on the highway... too much traffic and the flow of vehicles moving is slowed considerably or stopped.

Answer 5

get a dictonary and know the answer
in london it means tax
in medicine it means redness
in muddi it means pain

Answer 6

means excess for ex:traffic congestion

http://en.wikipedia.org/wiki/Congestion
http://www.investopedia.com/terms/c/congestion.asp

Answer 7

in arabic it means CROWDED