The meaning of UNDEFINED is not defined. How to use undefined in a sentence. UNDEFINED definition: 1.

Understanding the Context

not clearly described, stated, or known: 2. not having been given a definition (= a statement…. Learn more. The undefined global property represents the primitive value undefined.

Key Insights

It is one of JavaScript's primitive types. Undefined behavior, computer code whose behavior is not specified under certain conditions Undefined value, a condition where an expression does not have a correct value Undefined variable, a variable that is accessed in code but has not been declared The meaning of undefined with an overview, related terms, and examples from programming. Understand how undefined variables can lead to common error messages. Define undefined. undefined synonyms, undefined pronunciation, undefined translation, English dictionary definition of undefined.

Final Thoughts

adj not defined or made clear: the job has remained undefined. ˌundeˈfinable adj Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 ©... null and undefined are loosely equal, but not strictly equal. The loose equality operator coerces operands of different types to boolean values, making null and undefined both false. The strict equality operator considers operands of different data types to be unequal. ...

Unlike the reserved keyword null, undefined is a property of the global ... Find 30 different ways to say UNDEFINED, along with antonyms, related words, and example sentences at Thesaurus.com. UNDEFINED definition: without fixed limits; indefinite in form, extent, or application. See examples of undefined used in a sentence.