1. to an extremely large degree; enormously
2. in a shocking or outrageous manner

Examples

• The house was monstrously expensive for such a small space.
• She was monstrously tall compared to her classmates.
• The villain behaved monstrously toward the innocent villagers.
• The project grew monstrously complex over time.
• He was treated monstrously by his former business partners.
• The cake was monstrously large for just two people.