opacity

English

Etymology

opaque +‎ -ity, from French opacité, from Latin opacitas.

Pronunciation

• (US) enPR: ōpăsʹĭti, IPA^(key): /oʊˈpæsɪtiː/

• Audio (US)

  (file)

Noun

opacity (countable and uncountable, plural opacities)

1. (uncountable) The state or quality of being opaque, not allowing light to pass through

   We could not see the sandbar due to the opacity of the muddy water.

2. (uncountable) The state or quality of being inaccessible to understanding.

   The opacity of these decisions is troubling.

3. (optics, countable) A measure of relative impenetrability to electromagnetic radiation such as light.

   The opacity of a clean glass window is near zero.

Synonyms

• opaqueness

Coordinate terms

• transparency

Derived terms

• referential opacity

 

Translations

state of being opaque; blocking light

• Belarusian: непразры́стасць f (njeprazrýstascʹ)
• Bulgarian: непрозрачност f (neprozračnost)
• Catalan: opacitat f
• Czech: neprůhlednost f
• Danish: uigennemsigtighed c, ugennemsigtighed
• Finnish: läpikuultamattomuus (fi), läpinäkymättömyys (fi)
• French: opacité (fr) f
• Galician: opacidade (gl) f
• German: Opazität (de) f, Undurchsichtigkeit f, Lichtundurchlässigkeit f
• Greek: αδιαφάνεια (el) f (adiafáneia)
• Indonesian: ketidakbeningan
• Latvian: necaurredzamība f, necaurspīdīgums m
• Norwegian:

  Bokmål: opasitet m, ugjennomsiktighet (no) m or f

• Portuguese: opacidade f
• Russian: непрозра́чность (ru) f (neprozráčnostʹ)
• Spanish: opacidad (es) f
• Swedish: opacitet (sv) c
• Tagalog: opasidad
• Ukrainian: непрозо́рість f (neprozóristʹ)

state of being inaccessible to understanding

• Bulgarian: неясност f (nejasnost)
• French: opacité (fr) f
• German: Undurchsichtigkeit f, Nebulösität f
• Tagalog: opasidad

measure of relative opaqueness

• Finnish: läpikuultamattomuus (fi), läpinäkymättömyys (fi)
• Indonesian: ketidakbeningan
• Tagalog: opasidad

The translations below need to be checked and inserted above into the appropriate translation tables. See instructions at Wiktionary:Entry layout § Translations.

Translations to be checked

• Swedish: ^{(please verify)} opak (sv)