1
: having the usual or normal size of its kind
a full-size keyboard
2
US, of a bed : having the dimensions 54 by 75 inches (about 1.4 by 1.9 meters)
also : of a size to fit a full-size bed
full-size sheets
compare king-size, queen-size, twin-size
3
US, of a vehicle : relatively large in size
especially, of a sedan : having four doors and seating for up to six
Not too long ago, everyone, and we mean everyone, from Elvis to your Aunt Bea drove a big, powerful full-size American car. … —Scott Oldham

Examples of full-size in a Sentence

Recent Examples on the Web
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The cherry on top is the full-size mirror that makes touch-ups a breeze. — Madison San Miguel, Allure, 30 Oct. 2026 After years of renderings, prototypes, and overly optimistic timetables, companies are now flying full-size aircraft, submitting hardware to regulators for certification, building factories, and testing routes with prospective customers. — IEEE Spectrum, 28 Oct. 2026 Other exterior highlights include a winter garden, a working firepit, and a full-size pickleball court. — Rachel Cormack, Robb Report, 26 Oct. 2026 For bigger parties, buyers can opt in on the full-size inner tent, which stretches out across most of the floor area to sleep 10 people. — New Atlas, 25 Oct. 2026 See All Example Sentences for full-size

Word History

First Known Use

1772, in the meaning defined at sense 1

Time Traveler
The first known use of full-size was in 1772

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Cite this Entry

“Full-size.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/full-size. Accessed 1 Nov. 2026.

Kids Definition

full-size

adjective
ˈfu̇l-ˌsīz
1
: having the usual or normal size of its kind
2
: having a size of 54 inches by 75 inches (about 1.4 meters by 1.9 meters)
a full-size bed
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