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Definition of optimum

optimum

/ˈɑːptɪməm/
op · ti · mum

Adverb:optimally
•
Plural:optima
•
Adjective:optimal
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optimum Lexical Profile

optimum Game Scores & Validity

• adjective

1

Most conducive to a favorable outcome; best or most advantageous under a particular set of circumstances.

Example

"The greenhouse maintains the optimum temperature and humidity for growing tropical orchids."

Synonyms
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Antonyms
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• noun

1

The most favorable condition, degree, or amount of something for achieving a particular result, such as growth, reproduction, or efficiency.

Example

"For this enzyme to function at its optimum, the pH of the solution must remain neutral."

Synonyms
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Word Nuance & Usage

While 'optimum' is widely accepted as both a noun and an adjective, formal and academic style guides often prefer 'optimal' for the adjective and reserve 'optimum' for the noun.

Word Origin & Etymology

Borrowed in the late 19th century directly from Latin optimum, the neuter singular of optimus ('best'), functioning as the superlative of bonus ('good').

Cite this Entry


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