it's impossible to define vs it's impossible defining

Both phrases are correct, but they are used in different contexts. 'It's impossible to define' is the more common and natural way to express the idea that something cannot be clearly explained or described. On the other hand, 'it's impossible defining' is less common and may sound awkward to native speakers. It is better to use 'it's impossible to define' for clarity and naturalness.

Last updated: March 22, 2024

it's impossible to define

This phrase is correct and commonly used in English.

This phrase is used to convey that something cannot be clearly explained or described.

Show examples from the web [+]

It is therefore practically impossible to define a realistic overall target and it could even be misleading.
Such a target would be virtually impossible to define and put into practice as innovation covers a wide range of activities which are very difficult to define and measure.
That it was impossible to define indicators also demonstrates that the Commission was not entirely prepared for the introduction of this Strand (see paragraphs 24, 57, 62 and 72).
whereas it is impossible to define SGIs uniformly, in a social and economic environment as diverse as that of the EU,
G. whereas it is impossible to define SGIs uniformly, in a social and economic environment as diverse as that of the EU,
AE. whereas, due to employment contracts across the EU and the diversity of such contracts within Member States, it is currently impossible to seek to define 'employee' at European level;
We believe that it is impossible to clearly define the implications of the draft budget on the strategy's flagship initiatives, and that more and better information is needed.
It is a virtually impossible task to define what the term quality' means in terms of further education, given that the education systems within the EU are as different as they are, which is also apparent from the debate here this afternoon.
It's impossible to bypass all stations.
It's impossible to get lost going to the kitchen.
It's impossible to believe that Lucia's been ill all this time.
Some people say it's impossible to repair.
It's impossible to meet women when you're in real estate.
Without our memories, it's impossible to know everything.
Now, it's impossible to replicate the spell cast on the dagger...
It's impossible to outsmart the HL-7 protocol.
I'm pretty sure it's impossible to be allergic to sugar.
Medically speaking, it's impossible to know.
All the other boys say it's impossible to swim there.
No, it's impossible to identify those contributing markers.

Alternatives:

it's impossible to describe
it's impossible to explain
it's hard to define
it's difficult to define
it's challenging to define

it's impossible defining

This phrase is correct but less common in English.

This phrase can be used in a more formal or literary context, but 'it's impossible to define' is more natural and commonly used.

Alternatives:

it's impossible to define
it's impossible to describe
it's impossible to explain
it's hard to define
it's difficult to define

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it's impossible to define vs it's impossible defining