Really intending what is said (or planned, etc); in earnest; not jocular or deceiving
Committed.
Without humor or expression of happiness; grave in manner or disposition
Important; weighty; not insignificant
In a serious manner; seriously.
Inspiring serious feelings or thoughts; sombrely impressive.
Characterized by or performed with appropriate or great ceremony or formality.
Of or pertaining to religious ceremonies and rites; (generally) religious in nature; sacred.
Deeply serious and sombre; grave.