serious

SE'RIOUS, a. [L. serius.]

1. Grave in manner or disposition; solemn; not light, gay or volatile; as a serious man; a serious habit or disposition.

2. Really intending what is said; being in earnest; not jesting or making false pretense. Are you serious, or in jest?

3. Important; weighty; not trijling.

The holy Sciptures bring to your ears the most serious things in the world. Young.