Definitions of mountainous

1. having hills and crags; " hilly terrain"

2. like a mountain in size and impressiveness; " mountainous waves"; " a mountainous dark man"

3. Full of, or containing, mountains; as, the mountainous country of the Swiss.

4. Large as, or resembling, a mountain; huge; of great bulk; as, a mountainous heap.

5. Full of mountains: large as a mountain: huge.

6. Abounding in mountains.

7. Like a mountain; huge.

8. Full of mountains; large as a mountain; huge; inhabiting mountains.

9. Full of mountains; huge.