Mutable

//ˈmjuːtəbəl// adj, noun

adj, noun ·Common ·High school level

Definitions

Noun
  1. 1
    Something mutable; a variable or value that can change.

    "Hypothesis 6.14: Entropy levels within the social group may vary but must be maintained below maximum entropy on certain relevant variables (e.g., on the six globals and five mutables)."

Adjective
  1. 1
    Changeable, dynamic, evolutive; inclined to change, evolve, mutate.

    "Vndoughtedly constaunce is an honourable vertue, as inconstance is reprochefull and odious. Wherfore that man whiche is mutable for euerye occasyon, muste nedes often repente hym, and in moche repentance is nat only moche foly, but also great detriment: whiche euery wyse man wyll eschue if he can."

  2. 2
    Having a value that is changeable during program execution.

    "A value of a mutable type can change. Objects and arrays are mutable: a JavaScript program can change the values of object properties and array elements. Numbers, booleans, null, and undefined are immutable."

  3. 3
    Being one of the signs Gemini, Virgo, Sagittarius and Pisces, associated with adaptability, flexibility and sympathy.
Adjective
  1. 1
    tending to undergo genetic mutation wordnet
  2. 2
    capable of or tending to change in form or quality or nature wordnet
  3. 3
    prone to frequent change; inconstant wordnet

Synonyms

All synonyms
changeableinconstantabateableable to adaptadaptableadjustable

Example

More examples

"Mutable objects can be changed after initialization; immutable objects cannot."

Etymology

From Middle English mutable, from Old French mutable, from Latin mutabilis (“liable to change”). By surface analysis, muta- + -able.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.