Meaning & use
monad
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Meanings
nouncountable
In philosophy, a single, indivisible unit regarded as the basic element of existence, especially in the thought of Leibniz.
Grammar: Used in philosophy: each monad is separate.
Patterns
- a monad of something
Leibniz believed the universe is made of countless monads.
Each monad, in his view, reflects the whole world from its own point of view.
The professor spent a lecture on the idea of the monad.
nouncountablecomputing
In computer programming, a structure that wraps a value and lets operations be chained together while handling side effects such as errors.
Grammar: Common in functional programming: the Maybe monad.
Patterns
- the something monad
- a monad for something
Haskell programmers use the Maybe monad to handle missing values.
A monad makes it easier to chain steps that might fail.
She wrote a blog post explaining monads in plain language.
nouncountablearchaic
The number one, or a single unit, as a first principle in ancient Greek thought.
Grammar: Historical use, rare today.
Patterns
- the Pythagorean monad
The Pythagoreans saw the monad as the source of all numbers.
In the old system, the monad stood for unity.
Word forms
| plural | monads |
|---|
Common combinations
- Leibniz's monad
- Leibniz's monad has no windows through which things can enter.
- the Maybe monad
- The Maybe monad wraps values that might be missing.
- monad laws
- Libraries are expected to obey the monad laws.
- explain a monad
- It is hard to explain a monad without examples.
- philosophical monad
- The philosophical monad differs from an atom.
Synonyms and how they differ
- unit
- Unit is a general word for a single thing, while monad is a specific philosophical or technical term.
- atom
- An atom in ancient philosophy is a physical particle, whereas a monad is non-physical and has an inner life.
- entity
- Entity is a broad word for anything that exists and does not suggest indivisibility.
Word family
- monadic adjective
- relating to a monad or to a single unit
- monadology noun
- the study or theory of monads, from Leibniz's work
- monadism noun
- the philosophy that reality is made of monads
- monads noun
- plural of monad
Commonly confused: monad or monoid? monad or nomad?
monad vs monoid
A monoid is a mathematical structure with a combining operation, and in programming it is a different idea from a monad.
monad vs nomad
A nomad is a person who moves from place to place, and the word is unrelated to monad despite the similar letters.
Practice
Who is most closely associated with the philosophical idea of the monad?
Choose one answer.
Leibniz developed the theory that reality is made of indivisible monads. The other philosophers held different views.
Make it your own
Write a sentence using “monad”, then check it and compare it with the examples above.