Simple Definition of cactus

from our Learner's Dictionary

cactus

noun

ˈkæktəs

plural cacti ˈkækˌtaɪ

or cactuses also US cactus

: a plant that lives in the desert and that has many sharp points (called spines)

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“Cactus.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/cactus. Accessed 23 Jun. 2026.

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