Informal and Regular

Informal

Informal adjective - Not rigidly following established form, custom, or rules.
Usage example: an informal meeting allowed everyone to get acquainted

Regular is an antonym for informal.

Regular

Regular adjective - Following or agreeing with established form, custom, or rules.
Usage example: thought about having a nontraditional wedding but in the end went with a regular ceremony instead

Informal is an antonym for regular.

Cite this Source
Regular and Informal. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/informal/regular
Informal & Regular. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/informal/regular>.
Regular or Informal. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/informal/regular.
Google Ngram Viewer shows how "informal" and "regular" have occurred on timeline