outwash plain

noun

variants or less commonly outwash apron

: a plain constructed of outwash that is ordinarily found on and beyond the distal side of a terminal or recessional moraine and that generally consists of a number of coalescing outwash fans

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