plural cubes
1
: an object that has six square sides
an ice cube
Cut the onion into half-inch cubes.
2
mathematics
: the number that results from multiplying a number by itself twice
The cube of 2 [=2₃] is 8. [=2 x 2 x 2 = 8]
3
US, informal + humorous
: cubicle sense 1
She decorated her cube with pictures of her children.
cubes; cubed; cubing
1
: to cut (food) into small cubes
Cube the carrots and potatoes.
three slices of bread, cubed
2
mathematics
: to multiply (a number) by itself twice
—usually used as cubed
2 cubed equals 8. [=2 x 2 x 2 = 8]
Cite this Entry
“Cube.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/cube. Accessed 22 Jun. 2026.
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