As I have been taught, apart from being a part of a name, the definite article in English is usually used for:

1) things that have already been mentioned earlier in conversation (like in "So you did take care of that mother, but what about the child?");

2) things that can be seen in the moment of speaking ("Look at the driver!");

3) things that are easily understood from the context ("We went fishing yesterday. The weather was terrible!");

4) things that are unique in this world ("The Sun is shining. The air is fresh.")

However, I've noticed that some nouns that don't fall into any of the four categories above are still used with the definite article:

"We went to the forest yesterday and..." - the first phrase written by a forum member in a forum thread. There was absolutely no conversation prior to this phrase and, therefore, there is no context provided yet. So, it automatically excludes case 1 and 3. The readers can't, of course, see any forest, which effectively excludes case 2, too. And there are many forests in this world. So, it's not case 4 either. If so, then what cases is it?

Here are some other examples:

"For whomever it may concern: please, note that, unlike in Europe and the USA, school students in Asia always have their school lunch in the classroom."

(Why not "in a classroom"?)

"Five irritating things that can easily happen to you at the airport:"

(Why not "at an airport"?)

"This species can be found in any river or a pond. In fact, it can also be found in the sea."

(Why not "in a sea"?)

  • 2
    Related: Definite Article Meaning Syndrome.
    – J.R.
    Aug 24, 2018 at 7:43
  • 2
    Keep in mind that "context" doesn't mean "previous conversation", it means the sociocultural context of that moment (which includes previous conversation). If you live in a place where there's one forest nearby, or one place in the forest that's typical to "go to", then "the forest" is easily understood from context. That doesn't really answer your question -- hence the comment, not answer -- but it's worth mentioning.
    – anon
    Aug 24, 2018 at 16:21
  • @NicHartley - :) Well, I kind of know what the context is all about. In my example, neither that it was "only one forest nearby", nor that it was "a typical place to go to" was known to readers.
    – brilliant
    Aug 24, 2018 at 19:29
  • @brilliant That's true, which is why it didn't answer your question :) It was more directed towards other people reading this question than you.
    – anon
    Aug 24, 2018 at 19:32
  • @NicHartley - I see. BTW, was I just now supposed to say "what the context is all about" or "what a context is all about"?
    – brilliant
    Aug 24, 2018 at 19:37

1 Answer 1


According to the Cambridge Dictionary, you have missed another case:


used before some nouns that refer to place when you want to mention that type of place, without showing exactly which example of the place you mean

We spent all day at the beach.
Let's go to the movies this evening.
I have to go to the bank and get some Euros

I think that the forest, the classroom, the airport and the sea in your phrases perfectly match this case.

Also, you may be right pointing out that the use of 'a' is fair in some of those phrases.


used to mean any or every thing or person of the type you are referring to

An airport and a sea fulfill this meaning but in my opinion you can't use a in your other phrases. They went to a specific forest. Asian students do not lunch in some classroom, they lunch in the same classroom where they are taught. In Spain at least, in schools students do not change classroom, different teachers come to the classroom.


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