noun which may take the genitive case particle 'no', noun
Used as a noun or no-adjective to mean something distinct or separate from the ordinary; often in formal or written contexts.
別段の事情がない限り、予定通り行います。
Unless there are special circumstances, we will proceed as planned.
別段の取り決めはありませ
There is no separate agreement.
adverb
(not) particularly; (not) especially
Adverbial use, almost always before a negative verb form; means 'not particularly' or 'not especially'.
別段変わったことはありません。
There is nothing particularly unusual.
別段気にしていません。
I'm not particularly bothered.
Kana spelling is common in informal writing.
Compound of 別 (separate) and 段 (step, grade), literally 'a separate step/grade', extended to mean 'special' or 'particular'.