total solar eclipse

noun

: an eclipse of the sun in which the moon completely hides the solar surface or photosphere and thereby cuts off all direct rays of sunlight from the observer

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