- being below an optimal level or standard.
Also sub·op·ti·mum [suhb-op-tuh-muh m] /sʌbˈɒp tə məm/.
Origin of suboptimal
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for sub-optimal
And the long-term trend of growth—unsatisfying, sub-par, sub-optimal, and insufficient growth—is still intact.The U.S. Economy Had a Hiccup, Not a Heart Attack, This Year
May 29, 2014
The patient declared cardiac dead has organs that are sub-optimal due to loss of blood flow to the organs.A Tragedy Compounded: The Heart-Wrenching Case of Jahi McMath May Have Devastating Consequences to Organ Donation
Soumitra R. Eachempati, MD
January 4, 2014
There is no longer any room for those with sub-optimal looks.Marty Feldman: Dead Cool
November 2, 2009
Word Origin and History for sub-optimal
Online Etymology Dictionary, © 2010 Douglas Harper