expando

E1X8P3A1N1D2O1

noun

A property added to an object at run-time.

UncommonScrabble 17
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Meanings

nounexpando (plural expandos)

plural expandos

  1. computingA property added to an object at run-time.

    I talk more about expandos in Chapter 10. This means that you can arbitrarily add new properties to an object whenever you want.

    2010, Alexei White, JavaScript Programmer's Reference
    1 more example

    Because JavaScript objects are not constrained to predefined interfaces as they are with .NET objects, you can set expando properties on any object.

    2009, Ted Pattison, Daniel Larson, Inside Microsoft Windows Sharepoint Services 3.0

Origin

Perhaps a short form of expandable object.

Full word history & related roots →

Rhymes & wordplay

Rhymes with expando

OrlandoFernandocommandomandoNandobandeaubandeauxhusbandorinforzandosforzando
All rhymes →
Cite this entry
APA

expando. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/expando

MLA

“expando.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/expando. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “expando,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/expando.

Source: expando on Wiktionary, CC BY-SA 4.0.