- The definition of facetious is a joke made about something serious.
An example of facetious is someone saying that people whose homes have burned down don't have to worry about whether the housekeeper did a good job.
facetious definition by Webster's New World
Origin: French facétieux ; from Classical Latin facetia: see facetiae and amp; -ous
facetious definition by American Heritage Dictionary
Origin: French facétieux, from facétie, jest, from Latin facētia, from facētus, witty.
- fa·ceˈtious·ly adverb
- fa·ceˈtious·ness noun