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Synonyms

suboptimal

American  
[suhb-op-tuh-muhl] / sʌbˈɒp tə məl /
Also suboptimum

adjective

  1. being below an optimal level or standard.


Usage

What does suboptimal mean? Suboptimal means below the optimal (best possible) level or standard. The words optimal and optimum both describe an ideal or perfect level, degree, result, or similar thing. Suboptimal means something has fallen short of that level. It is often used in phrases like suboptimal performance and suboptimal conditions. Example: The patient’s heart is performing at a suboptimal level.

Etymology

Origin of suboptimal

First recorded in 1930–35; sub- + optimal


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

After three suboptimal innings, Glasnow settled down in a trust-building exercise of an outing against the Giants and their triple A-caliber lineup.

From Los Angeles Times ● Sep. 19, 2026

But in the past, when the two metrics have gotten close to these levels, suboptimal returns have followed, regardless of where valuations stood.

From MarketWatch ● Jul. 14, 2026

Speaking recently to the No Laying Up podcast, USGA's John Bodenhamer, the man responsible for course set-up this year accepted the previous conditions had been suboptimal but insisted they had "learned a lot".

From BBC ● Jun. 18, 2026

“Individual stories of altered and suboptimal miscarriage management emerged quickly in the days following Dobbs, including several overtly tragic examples,” he said.

From Salon ● May 26, 2026

“Okay. Sorry. That was extremely suboptimal of me just now. Are you angry?”

From "We Were Liars" by E. Lockhart

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