1. the quality or state of being vast; immense size or extent
Usage: formal; literary

Examples

• The vastitude of the ocean overwhelmed the first-time sailor.
• She contemplated the vastitude of space and felt humbled.
• The desert’s vastitude stretched endlessly in all directions.
• The vastitude of his knowledge impressed even his professors.
• Standing atop the mountain, they marveled at the vastitude of the landscape below.
• The vastitude of the library’s collection took years to fully catalog.