Meaning & use
undefined
Last updated
Not clearly or precisely explained, determined, or specified.
See it in a sentence
The contract left the project's scope undefined, leading to disputes later.
In mathematics, division by zero is considered undefined.
A note on using this word
In mathematics and computer science, "undefined" has a precise technical meaning describing an operation or value with no assigned result.
Words with a similar meaning
Choose a synonym to suit the sentence. Meanings can overlap without being identical.
Words with an opposite meaning
Make it your own
Write a sentence using “undefined”, then compare your use with the examples above.