Definitions
1.nounSpecter, ghost, haunting spirit
2.verbTo make grim; to give a stern or forbidding aspect to.
3.adjectiveDismal and gloomy, cold and forbidding"Life was grim in many northern industrial towns."
4.adjectiveRigid and unrelenting"His grim determination enabled him to win."
5.adjectiveGhastly or sinister"A grim castle overshadowed the village."
6.adjectiveDisgusting; gross