Not frivolous.
"Frivolous" fits the definition of incapable of serious thought.
When we say on a serious note, we mean jokes apart , let's be serious now, something like that!
see link
Well, it translates to serious
Of, showing, or characterized by deep thought.
a tragedy, by definition, for example- Titanic.
make a serious or urgent request, typically to the public.
"The definition of aggravated assault is a person attempting to or causing serious bodily harm to another individual. Or causing an injury on purpose. The legal definition has more information, however, this is the basic definition."
A very serious fire where many units are needed.
Acholis has more than one definition. Acholis is people from Guru who are hardworking and serious with their work. Another definition of Acholis is a Luo Nilotic ethnic group from Northern Uganda.
A kid friendly definition of disease would be "a very serious sickness a person/people could catch or already have from their parents.
The definition of obstruction of legal process is anything that hinders or prevents the execution of a process outlined by law. This is considered to be a serious crime in most states.