Some years ago I was watching a quiz program that included a question about what US state was landlocked. The correct response among some choices was Missouri.
I was sure that none of the choices were correct, as one may navigate from various parts of Missouri to any ocean in the world.
I contacted the production staff of this program for clarification. In response I was assured that Missouri was landlocked, and, among other validations I received:
Cambridge Dictionaries Online defines "landlocked" as: "having no seacoast"
The New Oxford Dictionary of English defines it as: "almost or entirely surrounded by land: having no seaport"
I was also assured that the question and answer had been properly researched and independently examined .
I am certain that one could navigate from St. Louis, MO, to the Tower Bridge in London in a sizable boat. I would feel foolish calling St. Louis "landlocked".
Merriam-Webster offers this:
1: enclosed or nearly enclosed by land
a landlocked country
2: confined to freshwater by some barrier
3: living or located away from the ocean
a landlocked sailor
The Port of South Louisiana, located above New Orleans on the Mississippi River is huge Wikipedia. It is among the busiest ports in the world. I do not think I want to refer to it as "landlocked".
I have been unable to form a proper definition of "landlocked" by my own means.
Is there a useful definition?
It may be significant that it was a UK quiz show that precipitated this question. I had not thought it important, but, as there is some difference in British and American dictionaries, it may be. In addition, the Commonwealth Court of Pennsylvania court opinion uses the term "landlocked" without any context of water at all. There may be some variance in US usage from the rest of the world.