San Luis

geographical name

San Lu·is san-ˈlü-əs

valley in southern Colorado and northern New Mexico along the upper Rio Grande between the San Juan and Sangre de Cristo mountains

Cite this Entry

Style

“San Luis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/San%20Luis. Accessed 3 Nov. 2025.

Copy Citation

More from Merriam-Webster

Word of the Day

fidelity

Listen to the pronunciation of fidelity

See Definitions and Examples »

Get Word of the Day daily email!

Popular in Grammar & Usage

'Affect' vs. 'Effect'

Using Bullet Points ( • )

The Difference Between 'i.e.' and 'e.g.'

What’s the difference between ‘cemetery’ and ‘graveyard’?

Democracy or Republic: What's the difference?

Popular in Wordplay

Skibidi, Mog & More: Gen Alpha Slang

13 Wonderful Words That You're Not Using (Yet)

Ten More Words from Taylor Swift Songs

Birds Say the Darndest Things

Even More Bird Names that Sound Like Insults (and Sometimes Are)

Popular

'Affect' vs. 'Effect'

Skibidi, Mog & More: Gen Alpha Slang

13 Wonderful Words That You're Not Using (Yet)