coincidentally
adv. sent. B2 Upper Intermediate US //koʊˌɪnsɪˈdɛnəɫi// UK //kəʊˌɪnsɪdˈɛntəli// co·in·ci·den·tal·ly
adv. happening at the same time by chance. You use this when two things happen together without anyone planning it.
adv. occurring by chance at the same time or in the same place. Often used as a sentence-modifying disjunct to introduce a surprising connection between two events.
Coincidentally, we both wore the same shirt today.
I was just thinking about my old friend when, coincidentally, she called me on the phone.
The two researchers published nearly identical findings in the same month, though they had, coincidentally, been working in complete isolation from one another for years.
Usage
Typically placed at the beginning of a sentence or before the main verb to highlight a chance connection.