optimal

adjective

op·​ti·​mal ˈäp-tə-məl 

: most desirable or satisfactory : optimum

the optimal use of class time

the optimal dosage of medication for a patient

conditions for optimal development

optimality

ˌäp-tə-ˈma-lə-tē 

noun

optimally

ˈäp-tə-mə-lē 

adverb

Examples of optimal in a Sentence

He keeps his engine tuned for optimal performance.

Under optimal conditions, these plants grow quite tall.

Recent Examples on the Web

Instead, adopt an integration plan customized for the leader, apply the concepts of optimal distinctiveness and monitor and adjust as necessary. — Liz Guthridge, Forbes.com, 17 July 2026

This slip-in pair goes on hands-free, while the memory foam insole delivers cushioning for optimal comfort. — Erin Cavoto, Travel + Leisure, 17 July 2026

Still, despite all these exotic maneuvers and locations, in the end, the optimal place to see an eclipse is wherever one can be seen. — Phil Plait, Scientific American, 17 July 2026

With the 2026 eclipse occurring in August—Spain’s second sunniest month—the chances are high for clear skies and optimal viewing conditions. — Catherine Tansey, Condé Nast Traveler, 17 July 2026

Word History

Etymology

optim(um) + -al entry 1

First Known Use

1890, in the meaning defined above

Phrases Containing optimal

• sub-optimal

Kids Definition

optimal

adjective

op·​ti·​mal ˈäp-tə-məl 

: optimum entry 2

optimally

-mə-lē 

adverb

Medical Definition

optimal

adjective

op·​ti·​mal ˈäp-tə-məl 

: most desirable or satisfactory : optimum

optimal concentrations of a drug

optimality

ˌäp-tə-ˈmal-ət-ē 

noun

plural optimalities

optimally

-mə-lē 

adverb