adjective graver grav′·er, gravest grav′·est

1. 1. requiring serious thought; important; weighty grave doubts
   2. not light or trifling in nature or in consequence; grievous a grave sin
2. 1. seriously threatening health, well-being, or life; critical; dangerous a grave illness
   2. seriously contrary to what is right or desirable; extremely bad a grave fault
   3. Theol. so evil as to cause spiritual death; mortal a grave sin
3. dignified and solemn or sedate in manner or mien
4. somber; dull grave colors
5. low or deep in pitch

Etymology: Fr < L gravis, heavy, weighty < IE base *gwer-, heavy, mill > quern, Gr barys, heavy, Sans gurúh, grave