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

In pharmacogenomics, understanding how genes affect drug efficacy helps doctors prescribe the right drug at the optimal dose while reducing adverse reactions. — Sujay Jadhav, Forbes.com, 25 June 2026

The case design is also high-quality, with a mesh front panel that highlights the three front-facing RGB fans (a fourth is at the rear for optimal airflow) and plenty of room for expansion if the default components aren't doing it for you. — K. Thor Jensen, PC Magazine, 24 June 2026

Broadcom shares have lost nearly 20% since early June on what can only be described as a sub-optimal quarter. — Zev Fima, CNBC, 24 June 2026

For days when billowy, slightly oversized pieces sound more appealing than form-fitting ones, the Merokeety Crewneck Maxi Dress balances structure with comfort, granting optimal movement without feeling swallowed in fabric. — Julia Morlino, Travel + Leisure, 23 June 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