Bannister
Definition 1 of 1

Context
The term is used primarily in architectural contexts

A banister is often a key design element.
Formality
The word is considered formal; in casual speech, people may just say 'railing.'

Use the term in formal writing and speeches.
Safety
Bannisters provide safety on stairs; ensure they are sturdy.

When discussing home safety, always mention the importance of a bannister.
Compare with
railbalustradestaircasehandrailguardrail
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