1. Information, topics, or issues that are secondary or marginal to the main subject or central concern
The historical details were considered peripheral matter and excluded from the main report.
Os detalhes históricos foram considerados assunto periférico e excluídos do relatório principal.
2. Elements that are not directly relevant or essential to a discussion, argument, or decision
While interesting, the anecdote was merely peripheral matter to the core argument.
Embora interessante, a anedota era meramente assunto periférico ao argumento central.