UNDEFINED Definition & Meaning - Merriam-Webster
2 days ago · The meaning of UNDEFINED is not defined. How to use undefined in a sentence.
undefined - YouTube
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What Is Undefined? - Computer Hope
Sep 7, 2025 · The meaning of undefined with an overview, related terms, and examples from programming. Understand how undefined variables can lead to common error messages.
UNDEFINED | English meaning - Cambridge Dictionary
UNDEFINED definition: 1. not clearly described, stated, or known: 2. not having been given a definition (= a statement…. Learn more.
undefined - JavaScript | MDN - MDN Web Docs
Jan 10, 2026 · The undefined global property represents the primitive value undefined. It is one of JavaScript's primitive types.
How can I check for "undefined" in JavaScript? - Stack Overflow
– Daniel Schaffer Aug 2, 2010 at 18:09 3 See: How to check for undefined in javascript?, and whether a variable is undefined and How to handle ‘undefined’ in javascript – Shog9 Aug 3, 2010 at 8:47 3
UNDEFINED | definition in the Cambridge English Dictionary
UNDEFINED meaning: 1. not clearly described, stated, or known: 2. not having been given a definition (= a statement…. Learn more.
UNDEFINED definition in American English | Collins English Dictionary
undefined These examples have been automatically selected and may contain sensitive content that does not reflect the opinions or policies of Collins, or its parent company HarperCollins. We welcome …
Undefined in JavaScript - GeeksforGeeks
Mar 13, 2024 · Undefined is a type of Data type in JavaScript. It is a primitive value undefined, when a variable is declared and not initialized or not assigned with any value.