suboptimal
Americanadjective
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
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.
Without fiduciaries serving as a buffer between the participant and the market, investments will be suboptimal.
From MarketWatch • Feb. 10, 2026
"Many older adults in suboptimal health often continue to make valuable contributions to those around them," Han said, "and they also may be the ones to especially benefit from being provided with opportunities to help."
From Science Daily • Dec. 19, 2025
Also in support was Saban’s fellow commentator Kirk Herbstreit, who at least acknowledged the situation would be suboptimal, but felt Kiffin should be allowed to complete “a magical year.”
From The Wall Street Journal • Dec. 1, 2025
Sticking with some fixed percentage just felt wrong and suboptimal to me.
From Barron's • Oct. 10, 2025
“Cadence! I really need to just start over. This is going from suboptimal down to total crap.”
From "We Were Liars" by E. Lockhart
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
