plural giants
1
: a legendary humanlike being of great stature and strength
2
a
: a living being of great size
b
: a person of extraordinary powers
3
: something unusually large or powerful
4
astronomy
: a star of high luminosity and relatively great mass and size
a red giant
As it exhausts its hydrogen fuel, changes in its interior trigger a transformation from a blue giant to a yellow supergiant in only a few hundred thousand years.—James B. Kaler
compare dwarf sense 4a, supergiant
: having extremely large size, proportion, or power
Cite this Entry
“Giant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/giant. Accessed 5 Sep. 2026.
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