all of

adverb

Synonyms of all ofnext
1
: not more than : merely, only
used to stress that an amount is surprisingly small
She was all of 20 years old when she started her business.
2
: as much as
used to stress that an amount is somewhat large
… this building cost all of five million dollars, and one might reasonably hope that there would be a little more to show for the money …Lewis Mumford

Examples of all of in a Sentence

the boat is all of 15 feet long

Word History

First Known Use

1828, in the meaning defined at sense 1

Time Traveler
The first known use of all of was in 1828

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Cite this Entry

“All of.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/all%20of. Accessed 1 Sep. 2026.

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