cactus

noun

cac·​tus ˈkak-təs How to pronounce cactus (audio)
plural cacti ˈkak-ˌtī How to pronounce cactus (audio)
-(ˌ)tē
or cactuses also cactus
: any of a family (Cactaceae, the cactus family) of plants that have succulent stems and branches with scales or spines instead of leaves and are found especially in dry areas (such as deserts)

Examples of cactus in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
What sets this version apart is its elevated exterior, crafted from a leather alternative that’s—get this—partially derived from cactus. Mariana Best, Better Homes & Gardens, 29 Dec. 2025 Use a cactus or succulent mix that is fast draining, or potting soil with pumice, sand, or perlite added. Kim Toscano, Southern Living, 26 Dec. 2025 The thrill of pushing the pace on terrain that remained shrouded in blackness until illuminated two seconds before our wheels were suddenly navigating its rocks and cliffs and cactus pushed all else from the mental spotlight. Joan Meiners, AZCentral.com, 8 Dec. 2025 At nearly 800,000 acres, Joshua Tree National Park features a whole host of amazing wonders, including Joshua tree (or yucca) forests, enormous rock formations, a cholla cactus garden, bighorn sheep, and tortoises. Lydia Mansel, Travel + Leisure, 1 Dec. 2025 See All Example Sentences for cactus

Word History

Etymology

New Latin, genus name, from Latin, cardoon, from Greek kaktos

First Known Use

1738, in the meaning defined above

Time Traveler
The first known use of cactus was in 1738

Cite this Entry

“Cactus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cactus. Accessed 1 Jan. 2026.

Kids Definition

cactus

noun
cac·​tus ˈkak-təs How to pronounce cactus (audio)
plural cacti -ˌtī How to pronounce cactus (audio)
-(ˌ)tē
or cactuses also cactus
: any of a large family of flowering plants able to live in dry regions and having fleshy stems and branches that bear scales or prickles instead of leaves

More from Merriam-Webster on cactus

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