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Definition of observable

observable

/əbˈzɜːrvəbəl/
ob · serv · a · ble

Adverb:observably
•
Plural:observables
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observable Lexical Profile

observable Game Scores & Validity

• adjective

1

Able to be noticed, perceived, or detected, especially through the senses or scientific instruments.

Example

"The treatment produced an observable improvement in the patient's mobility within two weeks."


2

Worthy of or requiring adherence, celebration, or compliance, such as a law, custom, or holiday.

Example

"The treaty established strict, observable rules for maritime navigation."

Synonyms
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Antonyms
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• noun

1

In physics, a physical property or dynamic variable of a system, such as position, momentum, or energy, that can be determined by measurement.

Example

"In quantum mechanics, every physical observable is represented by a linear operator."

Word Nuance & Usage

Do not confuse 'observable' (capable of being seen or noticed) with 'observant' (quick to notice things or paying close attention).

• Rhymes for observable

Word Origin & Etymology

Borrowed from French observable or directly from Latin observabilis ('remarkable, noticeable'), from observare ('to watch over, notice, keep').

Cite this Entry


Wordmom. (2026). Definition of Observable. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/observable
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