nav‧i‧ga‧tion [uncountable]
1TTSG the science or job of planning which way you need to go when you are travelling from one place to another:
compasses and other instruments of navigation
2TTWTTA when someone sails a ship along a river or other area of water:
Navigation becomes more difficult further up the river.
3 when you click on words, pictures etc in order to move between documents that are connected on the Internet
navigational adjective [only before noun]

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