In English Grammar, before ordinals (first, second, third...), we always use the definite article "the."

Consider the sentence below.

If the same person calls a second time within a 15-minute period, allow it.

In the above sentence, "a" is used before the ordinal "second." As far as I understand it should be "the," not "a." I found this sentence from my android phone.

Please, someone, explain to me why it is "a," not "the?"

  • This issue is addressed at: english.stackexchange.com/questions/1587/… Aug 15, 2019 at 12:45
  • Actually, the post referred to in the previous comment is dominated by a discussion of usage involving dates. Moreover, the response that best describes the grammatical principles involved does not address the specific situation here. Aug 15, 2019 at 12:57

2 Answers 2


"A" is correct here, and "the" would be odd.

Normally, "the" is the article used with an ordinal because what is being described is a specific item in a specific ordering of a set. There is no vagueness about what is being referred to.

In this specific example, however, there is, as yet, no such item to be referenced specifically. The sentence is conditional.

If more than twelve guests arrive, you will need to set up a third table.

In the preceding example, we do not talk about "the" third table because what is primarily being contemplated is a set of two tables. I do not say that "the third table" is wrong, but it would, in American English, be atypical.

In your example, it is not expected that someone will call more than once during an interval of fifteen minutes. If there were such an expectation, it would be proper to say in American English

When someone calls the second time ...

but even then it might better be to say

If someone calls for a second time

if there is no certainty about a second call.

  • It's true OP's example would sound "odd" if we simply replaced a by the. But if we just introduce a preposition, If the same person calls for the second time within a 15-minute period, allow it sounds "reasonable enough" to me. Aug 15, 2019 at 14:40
  • @FumbleFingers I agree. The key point to me is that the rule about the necessity for the definite article to precede an ordinal does not necessarily apply in conditional sentences. I am not sure that I can formulate a rule for when, in conditionals, to prefer the definite article preceding ordinals rather than the indefinite article. I just know that sometimes "the" sounds odd whereas "a" or "an" seldom or never sounds odd. Aug 15, 2019 at 16:40
  • In contrast, "The second time the same person calls,..." is correct, because in that case the second call is more "real" in the indicative than in the "if" subjunctive examples. Aug 15, 2019 at 22:34
  • @Monty Good point. Good question. Obviously there were nuances I missed in my answer. Aug 15, 2019 at 23:10
  • Or a second call could be a given. You will receive two calls. If the same person calls the second time within a 15-minute period, allow it. Aug 16, 2019 at 5:57

Interesting question.

I haven't found any sources on it, but to me "a/an" with an ordinal can be used when the ordinal is beyond the end of the series expected, or originally counted.

This is especially when there was only expected to be one item (as in your example).

If somebody calls a second time ...

implies that this is unexpected, the norm being only one call.


We had arranged to meet twice, but he came back a third time!

suggests that this third visit was a surprise.

Three men were waiting for me. The third carried a briefcase. Then I saw a fourth man in the background.

In all these cases, the is possible, but I think it is less likely in ordinary speech: using it in this context sounds to me like a narrative device to suggest that the speaker (or the hearers) know more than is being said, so that this extra item is not a surprise.

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