Simple Definition of starfish

from our Learner's Dictionary

starfish

noun

plural starfish also starfishes
: a sea animal that has five arms and that looks like a star

Cite this Entry

“Starfish.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/starfish. Accessed 24 Jun. 2026.

More from Merriam-Webster on starfish

More from Merriam-Webster