наречие 1) случайно 2) кстати, между прочим; в этой связи Например: Incidentally, I wanted to have a word with you about your academic career. — Кстати, я хотел поговорить с тобой по поводу твоей научной карьеры.
adverb 1. in an incidental manner; not intentionally Example: the arrant nonsense of some of his statements is incidentally hilarious — John Lahr 2. by way of interjection or digression; by the way Example: fortunate in having a good teacher…—still living, incidentally — John Fischer