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Definitions

A1

ADJECTIVE
optimal
Synonyms
STRONGEST
excellent
WEAK
24-carat ace best capital choice choicest flawless gilt-edge greatest highest ideal matchless maximum most advantageous most favorable peak peerless perfect select solid-gold superlative top world-class
ADJECTIVE
optimum
Synonyms
STRONG
ace capital choice choicest excellent flawless gilt-edge greatest highest ideal matchless maximum most advantageous most favorable optimal peak peerless perfect select solid-gold superlative world-class
Antonyms
STRONG
least poorest worst

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.

Netherlands and France issued warnings to airlines that Jet A1, one of the most widely used types of jet fuel, was temporarily available in limited supply—or not at all.

From The Wall Street Journal • Apr. 10, 2026

"Jet A1 fuel is sourced via a major UK/global supplier from a diverse range of countries, helping maintain a dependable and resilient supply chain," they said.

From BBC • Apr. 3, 2026

My story on the rapidly unfolding events and reaction to the outcome ran on A1.

From Los Angeles Times • Dec. 22, 2025

The first match is A1 v A2, so Mexico would play Scotland in the opening game of the World Cup.

From BBC • Dec. 4, 2025

HARRY: Strange, A1 being worried he’ll be sorted into Slytherin.

From "Harry Potter and the Cursed Child" by J.K. Rowling