reasonableness

rea·son·able·ness
R1E1A1S1O1N1A1B3L1E1N1E1S1S1
/ˈɹiː.zə.nə.bəl.nəs//ˈɹiːz.nə.bəl.nəs/Australia[ˈɹɪiz.nə.bəl.nəs]

noun

The state or characteristic of being reasonable.

Similar
reasonabilityrationalityreasonmoderatenessmodestnesstenabilitytenableness
OriginMiddle English resonabilnes, resonabilnesse, resonablenesse →
Less commonScrabble 16
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Meanings

nounreasonableness (usually uncountable, plural reasonablenesses)

plural reasonablenesses

  1. uncountableusuallyThe state or characteristic of being reasonable.

    This dictates the reasonableness of the rupture of a unipersonalist absolute that is pseudomonotheistic since, in this case, the possibility of any other being would have been made impossible.

    2004, George F. McLean, Robert R. Magliola, William Fox, Democracy: In the Throes of Liberalism and Totalitarianism, page 101
  2. countableusuallyA reasonable action or behaviour.

Synonyms & antonyms

Similar
reasonability

nounthe state of having good sense and sound judgment

Similar
rationalityreason
Broader
sanitysaneness

nounthe property of being moderate in price or expenditures

Similar
moderatenessmodestness
Broader
inexpensiveness

nounthe quality of being plausible or acceptable to a reasonable person

Similar
tenabilitytenableness
Broader
plausibilityplausibleness
Also see
moderatenessmodestnessrationalityreasonreasonabilitytenabilitytenableness

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Middle Englishresonabilnes, resonabilnesse, resonablenesse
  2. Englishreasonableness

From Middle English resonabilnes, resonabilnesse, resonablenesse, equivalent to reasonable + -ness.

More words from Middle English

Full word history & related roots →

Translations

Ancient Greek ἐπιείκεια
  • ἐπιείκεια (epieíkeia)state or characteristic of being reasonable
Czech rozumnost
  • rozumnoststate or characteristic of being reasonable
French modération
  • modérationstate or characteristic of being reasonable
German Vernünftigkeit
  • Vernünftigkeitstate or characteristic of being reasonable
Irish réasún, réasúntacht
  • réasúnstate or characteristic of being reasonable
  • réasúntachtstate or characteristic of being reasonable
Italian ragionevolezza
  • ragionevolezzastate or characteristic of being reasonable
Portuguese razoabilidade
  • razoabilidadestate or characteristic of being reasonable
Romanian rațiune
  • rațiunestate or characteristic of being reasonable
Turkish makuliyet
  • makuliyetstate or characteristic of being reasonable
Cite this entry
APA

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

MLA

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

Chicago

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

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