Grammar fix
a defining feature
characteristic trait (C1 figurative collocation)
an essential or most noticeable quality that makes something or someone different from others in a way that is central to its identity.
Hear it in context
Notice where the phrase sounds natural.
- A defining feature of Scandinavian design is its emphasis on simplicity and functionality.society
- One defining feature of modern education is the integration of technology into everyday learning, which has transformed how students access information.IELTS speaking
Fix the pattern
Pattern: a defining feature of [noun] is/was...
WrongIt's a defining feature for the brand.
RightIt's a defining feature of the brand.
'Defining feature OF' something — not 'for'.
Patterna defining feature of [noun] is/was...
Use it right
Choose the version that sounds natural in speech.
'Defining feature' is the natural collocation; the formal paraphrase is bloated.
Build natural chunks
Words that usually travel with it.
defining + featurea defining featuredefining characteristicthe defining momentdefining trait
Don't confuse it
Unlike 'main feature' or 'important feature', which can refer to any significant aspect, 'defining feature' specifically means the quality that most clearly distinguishes something from others.