unbound

U1N1B3O1U1N1D2
/ʌnˈbaʊnd/

adjective

Not obligated.

“an unbound book”

Opposite
Less commonScrabble 10

Meanings

verb
  1. participlepastsimple past and past participle of unbind
adjectiveunbound (not comparable)
  1. Not bound.
    1. not comparableNot obligated.

      Near-synonyms: unconstrained, unrestrained, unencumbered; unfettered, fetterless

      1 more example

      The terms of the contract inadvertently left certain unbound aspects to subjective interpretation.

      Synonyms: unconstrained, unrestrained, unencumbered, unfettered, fetterless

    2. not comparableNot tied up.

      The hostages' hands were left unbound.

      1 more example

      Near-synonyms: unfettered, fetterless, unrestrained, unchained, unshackled, shackleless, unmanacled, unhandcuffed

      Synonyms: unfettered, fetterless, unrestrained, unchained, unshackled, shackleless, unmanacled, unhandcuffed

    3. not comparableWithout a binding.

      an unbound book

      1 more example

      Beneath an old ebony table were two long carved oak chests. I lifted the lid of one, and at the top was a once-white surplice covered with dust, and beneath was a mass of tracts — Commonwealth Quartos, unbound — a prey to worms and decay.

      1880, William Blades, The Enemies of Books, page 40
    4. not comparablenuclear physicsLying beyond the proton or neutron drip line; having a negative particle separation energy; capable of decaying by the spontaneous exothermic emission of one or more nucleons.

      Helium-2 is unbound, as it is energetically favorable for it to split into two separate protons.

Synonyms & antonyms

More synonyms by meaning

adjectivenot secured within a cover

Similar
Opposite

adjectivenot restrained or tied down by bonds

Opposite

adjectivenot held in chemical or physical combination

Similar

Synonym sets from Open English WordNet, CC BY 4.0.

Translations

Bulgarian несвързан, свободен
  • несвързан (nesvărzan)not bound or tied up
  • свободен (svoboden)not bound or tied up
  • неподвързан (nepodvărzan)without a binding
Dutch ontbond, ontbonden
  • ontbondsimple past of "to unbind"
  • ontbondensimple past of "to unbind"
  • ontbondenpast participle of "to unbind"
German ungebunden
  • ungebundennot bound or tied up
Japanese とじていない
  • とじていない (tojiteinai)past participle of "to unbind"
Latin solūtus
  • solūtusnot bound or tied up
Swedish obunden
  • obundennot bound or tied up

Rhymes & wordplay

Rhymes with unbound

All rhymes →
Cite this entry
APA

unbound. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/unbound

MLA

“unbound.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/unbound. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “unbound,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/unbound.

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