I have hard time understanding why in this phrase, property is preceded with a definite article. As this book is one of many properties, the indefinite article sounds more natural, to me.

Of course, I'm wrong, but I would like to know why.

  • "Property" is not any other property, but the property modified (restricted) by the prepositional phrase that is headed by "of".
    – user140086
    Jul 2, 2016 at 9:20
  • You wouldn't say, "This is a house where I live." (unless you have 2 or more homes!): you would say "This is the house where I live." because you are identifying that one particular house. Likewise, you would say "This book is my property." or "This book is the property of Fred."
    – TrevorD
    Jul 2, 2016 at 11:27
  • @TrevorD Not that I'm arguing but if I say "This book is one of my properties" wouldn't "This book is a property of mine" be the right alternative?
    – user11580
    Jul 2, 2016 at 13:56
  • @TimBezhashvyly See my answer below.
    – TrevorD
    Jul 2, 2016 at 19:30

3 Answers 3


I don't think that either of the previous answers truly nails the rationale behind this usage. I don't think the following does either, but I consider the reasoning a useful addition.


The bank has a responsibility to inform customers of changes in interest rates.


The bank has the responsibility to inform customers of changes in interest rates.

are quite acceptable.

This argues that qualification of a noun is not the sole factor involved.

(Though these versions are near-interchangeable, the one with the definite article carries at least a hint that the need to inform people of interest-rate changes is common knowledge. And, although the version with the indefinite article may be said to carry a hint of other responsibilities, I'd say that this isn't a count-noun usage.)

Perhaps it's possible only to say that the definite article is often the default choice (or perhaps on occasion just a choice) with non-count nouns in expressions that have become idiomatic:

[This accident was] the fault of ... [nobody in particular, say]

the responsibility of

the property of

[Did they have] the chance of

He had the nerve to ...


felt a/the need to

... but note

have a/n duty / obligation / mind to.

  • I think you are mistaken. The noun responsibility has both countable and non-countable usage. Also, I don't think my answer says "qualification of a noun is the sole factor involved". In which part of my answer did I imply that?
    – user140086
    Jul 3, 2016 at 6:19
  • Your answer doesn't even mention countness, far less the grey area about whether 'has a responsibility to' shows a count, non-count, or somewhere-in-between usage (note that, although 'a' is used, 'has two responsibilities to' would sound most unnatural under most circumstances). Jul 3, 2016 at 8:34
  • The OP didn't ask about countness and I don't think your example sentences "the bank has..." are relevant to the OP's question as the to-infinitive could be interpreted in both ways as adverbial and adjectival. I think that's where your confusion comes from.
    – user140086
    Jul 3, 2016 at 8:38

The question on whether to use a definite article or indefinite article is not easy to answer. (Please note I used "the" instead of "a" in this sentence).

In your example "This book is the property of...", "property" is not any other property, but the property modified (restricted) by the prepositional phrase that is headed by "of".

The following Merriam Webster definition 2 b (1) explins that "the" is

used as a function word before a noun to limit its application to that specified by a succeeding element in the sentence: 'the poet Wordsworth", 'the days of our youth', 'didn't have the time to write'

As you can see, the nouns in the three examples are all modified – by a proper noun Wordsworth, prepositional phrase of our youth and to infinitive to write respectively.

Related question: Are there any simple rules for choosing the definite vs. indefinite (vs. none) article?

  • 1
    But this fails to distinguish between 'This is the home of the Smiths' (quite possibly a unique designation) and 'This is the property of the Smiths' (as, no doubt, are a lot of other things). I believe the latter is a heavily idiomatic usage, and can't think offhand of similar examples. Jul 2, 2016 at 23:43
  • Notice also that in 'I didn't have the time.' the noun isn't (overtly) qualified, but is certainly non-count. Jul 3, 2016 at 8:43

[This answer relates specifically to British English.]

Property (in the sense of possessions) is a non-count / uncountable / mass noun.

Oxford Dictionaries define it as follows:

A thing or things belonging to someone; possessions collectively
she wanted Oliver and his property out of her flat
the stolen property was not recovered
When arrests were made stolen property was recovered that belonged to two victims of a robbery in the town centre.
He also faces a charge of possessing stolen property in connection with the March 11 incident.
Police are recommending charges of possessing stolen property, and break, enter and theft against the man.

Law The right to the possession, use, or disposal of something; ownership:
rights of property
But how were those notions of ownership and property understood in customary terms?
Just because of the abuse of property ownership, private property should not altogether be eliminated.
The second major element in communist doctrine was the social ownership of property and central planning of the economy.

Cambridge Dictionaries define it as follows:

an object or objects that belong to someone
The club does not accept responsibility for loss of or damage to club members' personal property.
Both books have "Government property" stamped inside them.
Children need to be taught to have respect for other people's property.

specialized: law the legal right to own and use something
The new tax system would be calculated on the value of property owned by an individual.
Apparently he was sacked after he was caught stealing company property.
The police impounded cars and other personal property belonging to the drug dealers.
The fire resulted in damage to their property.
In an auction, goods or property are sold to the highest bidder.

Because (in the senses mentioned above) property is a mass noun, it is not normally used with the indefinite article "a", nor in the plural form.

The expression quoted in the question: This book is the property of ... therefore uses "the property".
Likewise, one could say: "This book is my property."

For the same reasons, one could not say: "This book is one of my properties" or "This book is a property of mine". The use of the word property in the plural, or as a singular count-noun with the indefinite article "a", in that way would immediately make one think of land or buildings, rather than possessions (for the reasons given in the next paragraph).

Note that, when used to refer to a building and/or land, property can be used either as a mass noun or as a count noun, and therefore can also be used in the plural form, or in the singular form with the indefinite article "a". (See the dictionary references cited above for further details.)

Additionally, when used to refer to "an attribute, quality, or characteristic of something", property is used as a count noun, and therefore can also be used in the plural form. (See the dictionary references cited above for further details.)

  • Nouns appearing as mass nouns can be used with the indefinite article in some circumstances: A golden light flooded the clearing. Jul 2, 2016 at 23:48
  • @EdwinAshworth Thanks. Have changed first para below definitions accordingly.
    – TrevorD
    Jul 2, 2016 at 23:54
  • A less arguable example is [Formal / literary style]: 'The new trainee spoke at the staff meeting with an enormous enthusiasm.' 'Light' in the previous example may be perhaps be considered somewhere between count and non-count. Jul 3, 2016 at 0:00
  • @EdwinAshworth I qualified my answer as relating solely to BrE, because the Cambridge Dict. citation gives "[C]" alone for BrE, but "[C/U]" for AmE; whereas the Oxford Dict. has "Mass Noun" for BrE, & nothing for AmE. Can you throw any light on the difference?
    – TrevorD
    Jul 3, 2016 at 0:17
  • Not on the peculiarities of dictionaries. 'Property' is count in 'We viewed three properties' and 'One unusual property of water is that the solid is less dense than the liquid around the freezing point.' It is non-count in 'Property is theft' and 'This is the property of J Smith'. Jul 3, 2016 at 0:33

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