nonserious

/nɑnˈsɪriəs/
adjective
  1. Not important, deep, or meaningful; lighthearted or trivial.
    • She wrote a nonserious poem just for fun.
    • We had a nonserious conversation about our favorite movies.
    • The meeting was mostly nonserious, with jokes and casual chat.
  2. Not dangerous or severe; minor in effect or consequence.
    • The storm caused only nonserious damage to a few fences.
    • It was a nonserious mistake that didn't affect the project.
    • The doctor said the injury was nonserious and would heal quickly.
Antonyms
What does "nonserious" mean? | whatsthatwordmean | whatsthatwordmean