1. A casual or brief comment made in passing, not central to the main discussion or topic
The professor made an incidental remark about the author's background during the lecture.
O professor fez um comentário incidental sobre a origem do autor durante a aula.
2. An offhand observation or aside that is tangential to the primary subject matter
Her incidental remark about the weather sparked an unexpected conversation.
Seu comentário incidental sobre o tempo desencadeou uma conversa inesperada.