Mutability
Mutable means that a memory location can be reassigned new values.
Related concepts: ValueAssignmentVariable
Closest Wikipedia entry: Immutable object
Misconceptions about Mutability8 documented Misconceptions
Check Yourself
FinalReferenceImpliesImmutability — Java
An object referred to by a final variable is an immutable objectImmutableRequiresFinalParameters — Java
Immutable classes need final constructor/method parametersPrivateFieldsImplyImmutability — Java
A class where all fields are private is immutablePrivateMeansFinal — Java
A private field cannot be changedThisAssignable — Java
One can assign to thisConstReferenceImpliesImmutability — JavaScript
An object referred to by a const variable is an immutable objectThisAssignable — JavaScript
One can assign to thisSelfAssignable — Python
Reassigning self changes the object on which a method is called