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A fjord (pronounced FEE-ord or fyord, SAMPA: ['fi:3:d] or ['faI3:d]) is a glacially overdeepened valley, usually narrow and steep-sided, extending below sea level and filled with salt water.

Fjords are found in locations where current or past glaciation extended to sea level. A fjord is formed when a glacier (carving its typical U-shaped valley) meets the sea and melts. This leaves a narrow, steep sided valley into which the sea floods. The flood creates a narrow, deep lake (sometimes as deep as 1300m) connected to the sea. The terminal moraine pushed down the valley by the glacier is left underwater at the fjord's entrance, causing the water at the neck of the fjord to be shallower than the main body of the fjord behind it.

This shallow threshhold and the protection afforded by the valley's sides generally means that fjords are excellent natural harbours. Consequently fjords often provide the home-port to fishing fleets, and in industrialised locations have come to be used for fish farming and ship building.

The word fjord comes from the Scandinavian languages. In Scandinavia, fjord is used for narrow inlets in Norway, Denmark and western Sweden, whereas the name Fjärd is used in a synonymous manner for narrow inlets in eastern Sweden, in most Swedish lakes, and in the Baltic sea. Note that the uses for the words fjord and fjärd are more general in the Scandinavian languages, than in English. Fjord in the English sense is taken from the kind of inlets found in Norway and in parts of Sweden.

Fjords are found on the west coast of Norway, in the southwest corner of New Zealand (see Fiordland), and on the south and west coasts of Alaska. The west coast of Scotland also features fjords (called "sea lochs"), and the long fjord-like bays of the New England coast are sometimes referred to as "fiards". The largest fjord in the world is Sognefjorden in Norway.

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 This shallow threshhold and the protection afforded by the valley's sides generally means that fjords are excellent natural harbours.  Consequently fjords often provide the home-port to fishing fleets, and in industrialised locations have come to be used for [[fish farming]] and [[ship building]].
-The word '''fjord''' comes from the [[Scandinavian language]]s. In [[Scandinavia]], '''fjord''' is used for ''narrow inlets'' in [[Norway]], [[Denmark]] and western [[Sweden]], whereas the name '''Fjärd''' is used in a synonymous manner for ''narrow inlets'' in eastern Sweden, in most Swedish lakes, and in the [[Baltic sea]]. Note that the uses for the words '''fjord''' and '''fjärd''' are more general in the [[Scandinavian language]]s, than in English. '''Fjord''' in the English sense is taken from the kind of inlets found in [[Norway]] and in parts of Sweden.
+The word '''fjord''' comes from the [[Scandinavian language]]s. In [[Scandinavia]], '''fjord''' is used for ''narrow inlets'' in [[Norway]], [[Denmark]] and western [[Sweden]], whereas the name '''Fjärd''' is used in a synonymous manner for ''narrow inlets'' in eastern Sweden, in most Swedish lakes, and in the [[Baltic sea]]. Note that the uses for the words '''fjord''' and '''fjärd''' are more general in the [[Scandinavian language]]s, than in English. '''Fjord''' in the English sense is taken from the kind of inlets found in Norway and in parts of Sweden.
 Fjords are found on the west coast of [[Norway]], in the southwest corner of [[New Zealand]] (see [[Fiordland]]), and on the south and west coasts of [[Alaska]].  The west coast of [[Scotland]] also features fjords (called "sea [[loch]]s"), and the long fjord-like bays of the [[New England]] coast are sometimes referred to as "fiards".  The largest fjord in the world is [[Sognefjorden]] in Norway.