1
: a complex structure of interdependent and subordinate elements whose relations and properties are largely determined by their function in the whole
The nation is not merely the sum of individual citizens at any given time, but it is a living organism, a mystical body … of which the individual is an ephemeral part …Joseph Rossi
2
: an individual constituted to carry on the activities of life by means of parts or organs more or less separate in function but mutually dependent : a living being
a multicellular organism

organismic

2 of 2

adjective

variants or less commonly organismal
1
: of or belonging or relating to an organism especially as a functional whole
2
: of or relating to organicism or organic mechanism : holistic
the organismic theory of the state

Examples of organism in a Sentence

Noun A human being is a complex organism.
Recent Examples on the Web
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Noun
This marked the first sighting of the organism in North America. Sofia Williams, Sacbee.com, 27 June 2026 Small organisms will absorb them first, then fish that consume those organisms, then predators that consume the fish. Melissa Cristina Márquez, Forbes.com, 2 July 2026 Microbial evolution has crafted both deadly molecules and clever tricks to dodge death as the wee organisms endlessly battle over turf and resources. Beth Mole, ArsTechnica, 26 June 2026 The research, which is being hailed as a major breakthrough, could usher in a new biotech era defined by synthetic organisms that can be grown from scratch and programmed to complete specific functions. Victor Tangermann, Futurism, 1 July 2026 See All Example Sentences for organism

Word History

First Known Use

Noun

circa 1774, in the meaning defined at sense 1

Time Traveler
The first known use of organism was circa 1774

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Cite this Entry

“Organism.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/organism. Accessed 7 Jul. 2026.

Kids Definition

1
: something having many related parts that function together as a whole
2
: an individual living thing that carries on the activities of life by means of organs which have separate functions but are dependent on each other : a living person, plant, or animal

Medical Definition

: an individual constituted to carry on the activities of life by means of organs separate in function but mutually dependent : a living being

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