English Reference
adverb

incidentally

adv.
US /ˌɪnsɪˈdɛntəɫi/ UK /ˌɪnsɪdˈɛntəli/ in·ci·den·tal·ly

  1. 01 B2 Upper Intermediate

    you use this when you want to add a quick piece of information that is not the main topic.

    used as a sentence connector to introduce a remark that is not directly related to the main subject of discussion.

    Simple

    We had a great time at the party — incidentally, did you see what Sarah was wearing?

    In context

    The report provides a comprehensive overview of the fiscal year; incidentally, it also highlights several areas where the department could reduce waste.

    Usage

    Usually placed at the beginning of a sentence or clause to signal a change in topic.

    by the wayparenthetically
  2. 02 C1 Advanced Formal

    happening as a small part of something else, or by accident.

    occurring as a minor consequence or accompaniment to a primary activity or event.

    Simple

    The two scientists discovered the new chemical incidentally while they were looking for something else.

    In context

    The data was collected incidentally during the primary study, yet it proved to be the most significant finding of the entire research project.

    Usage

    Often follows the verb it modifies.


From incidental + -ly.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated