cloister vault

noun

: a cupolalike vault on a square or polygonal base with diminishing courses to the top and of similar horizontal section throughout and in shape like a pyramid or frustum of a pyramid with sides curved convexly outward

The Ultimate Dictionary Awaits

Expand your vocabulary and dive deeper into language with Merriam-Webster Unabridged.

1. Expanded definitions
2. Detailed etymologies
3. Advanced search tools
4. All ad-free

Discover what makes Merriam-Webster Unabridged the essential choice for true word lovers.

Start Your Free Trial Now