observable

adjective
ob·​serv·​able | \ əb-ˈzər-və-bəl \

Definition of observable

2 : capable of being observed : discernible

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Other Words from observable

observability \ əb-​ˌzər-​və-​ˈbi-​lə-​tē \ noun
observable noun
observably \ əb-​ˈzər-​və-​blē \ adverb

Synonyms & Antonyms for observable

Synonyms

apparent, seeable, visible, visual

Antonyms

invisible, sightless, viewless

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Examples of observable in a Sentence

the size of the observable universe scientists often work with phenomena that are not directly observable

Recent Examples on the Web

For some women, an ovarian cancer diagnosis comes after a lengthy, frustrating, stressful process, given that many don’t have observable symptoms until the cancer is in a more advanced stage. Claire Gillespie, SELF, "3 Women on How They’ve Handled the Hardest Parts of Ovarian Cancer," 13 Dec. 2018 Tiny fluctuations observable in the CMB are evidence of seeds that grew into the cosmos' larger structure, so scrutinizing this light can reveal key insights about the universe's very early days. Mike Wall, Space.com, "Observations of the Early Universe Reaffirm the Existence of Dark Matter and Dark Energy," 18 July 2018 But in quieter, sometimes less observable ways, the carnage mounts in racial injustice and discrimination. Thabiti Anyabwile, Washington Post, "Overturning Roe v. Wade isn’t worth compromising with Trump, my fellow evangelicals," 28 June 2018 There were also, however, observable patterns in the data that might help refine the process of classification. The Economist, "A big collaboration is trying to understand diseases of the psyche," 28 June 2018 Researchers are almost always forced to rely on what people remember about their dreams, rather than directly observable data. Louise Matsakis, WIRED, "Do You Dream in Internet? Don’t Freak Out," 23 June 2018 The airplane is very much built to go into combat and be low-observable. William Langewiesche, The Atlantic, "An Extraordinarily Expensive Way to Fight ISIS," 21 June 2018 This is the picture that our observable universe is not all that exists, but rather [is] one pocket of infinitely many universes, forming a multiverse. Alexander Hellemans, Scientific American, "A Conversation with Thomas Hertog, One of Stephen Hawking’s Final Collaborators," 24 May 2018 This has contributed to South Dakota’s observable tax collection windfall. Chris Cox, WSJ, "Sales Tax Revenue Isn’t Collapsing," 19 Apr. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'observable.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of observable

1589, in the meaning defined at sense 2

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Time Traveler for observable

The first known use of observable was in 1589

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More Definitions for observable

observable

adjective

English Language Learners Definition of observable

: possible to see or notice : able to be observed

observable

adjective
ob·​serv·​able | \ əb-ˈzər-və-bəl \

Kids Definition of observable

: noticeable Her cat's shape was observable under the blanket.

Other Words from observable

observably \ -​blē \ adverb

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Comments on observable

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