serious

1 ENTRIES FOUND:
serious /ˈsirijəs/ adjective
serious
/ˈsirijəs/
adjective
Britannica Dictionary definition of SERIOUS
[more serious; most serious]
1 
: having an important or dangerous possible result
2 
: involving or deserving a lot of thought, attention, or work
3 
: giving a lot of attention or energy to something
4 
: not joking or funny
5 
always used before a noun, informal : large or impressive in quality or amount
6 
: having or involving strong romantic feelings
— often + about
7 
: thoughtful or quiet in appearance or manner