fungible

noun

Synonyms of fungible
: something that is fungible (see fungible entry 1 sense 1) : a good one part or quantity of which can be substituted for another of equal value in satisfying an obligation
usually used in plural
Fungibles may be valued by weight or measure.

Did you know?

Before expectations about the origins of fungible mushroom into mycological fantasy: no, fungible has no relation to the noun fungus and its plural fungi. The fungi in fungible is there because of the Latin verb fungi, meaning “to perform,” ancestor of both fungible and function. Fungible is considerably less familiar than its cousin to most English users, but it pops up like toadstools (sorry) in legal, technological, and economic contexts. Something described as fungible can be exchanged for something else of the same kind. For example, when we say “oil is a fungible commodity,” we mean that when a purchaser is expecting a delivery of oil, any oil of the stipulated quantity and quality will usually do. Another example of something fungible is cash. It doesn't matter what twenty dollar bill you get—it’s still worth the same amount as any other twenty dollar bill. In contrast, something like a work of art (or an NFT, aka a “non-fungible token”) isn’t fungible; a purchaser would expect a specific, identifiable item to be delivered. In broader use, fungible can mean “interchangeable,” or sometimes “readily changeable to adapt to new situations.”

Word History

Etymology
First Known Use

1681, in the meaning defined above

Time Traveler
The first known use of fungible was in 1681

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Cite this Entry

“Fungible.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fungible. Accessed 11 Jun. 2026.

Kids Definition

fungible

adjective
fun·​gi·​ble
ˈfən-jə-bəl
1
: having such a nature that one part or quantity may be replaced by another part or quantity to satisfy an obligation
2
: capable of being interchanged
3

Legal Definition

fungible

1 of 2 adjective
fun·​gi·​ble
ˈfən-jə-bəl
: being something (as money or a commodity) one part or quantity of which can be substituted for another of equal value in paying a debt or settling an account
oil, wheat, and lumber are fungible commodities

fungible

2 of 2 noun
: something that is fungible
Etymology

New Latin fungibilis, from Latin fungi to perform

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