1. not relenting; having no pity; not being or becoming lenient, mild, gentle, or merciful; unyielding.

- grim determination

- grim necessity

Similar word(s): implacable, inexorable, relentless, stern, unappeasable, unforgiving, unrelenting

2. shockingly repellent; inspiring horror

- the grim aftermath of the bombing

- the grim task of burying the victims

Similar word(s): alarming, ghastly, grisly, gruesome, macabre, sick

3. harshly ironic or sinister

- a grim joke

- grim laughter

Similar word(s): sarcastic, black, mordant

4. harshly uninviting or formidable in manner or appearance

- a grim man loving duty more than humanity

- undoubtedly the grimmest part of him was his iron claw

Similar word(s): unpleasant, dour, forbidding

5. filled with melancholy and despondency

- took a grim view of the economy

Similar word(s): dejected, blue, depressed, dispirited, down, downcast, downhearted, gloomy, low

6. causing depression

- grim rainy weather

Similar word(s): cheerless, depressing, uncheerful, blue, dark, dingy, disconsolate, dismal, drab, drear, dreary, gloomy, sorry

Sentences with grim as an adjective:

- Life was grim in many northern industrial towns.

- His grim determination enabled him to win.

- A grim castle overshadowed the village.

- Wanna see the dead rat I found in my fridge? —Mate, that is grim!