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1
: having the highest possible classification
—used of a ship
2
: of the finest quality : first-rate
Synonyms
- A-OK
- awesome
- bang-up
- banner
- beautiful
- blue-chip
- blue-ribbon
- boffo
- bonny [chiefly British]
- bonnie
- boss [slang]
- brag
- brave
- bully
- bumper
- capital
- choice
- classic
- cool [slang]
- corking
- crackerjack
- cracking
- dandy
- divine
- dope [slang]
- down [slang]
- dynamite
- excellent
- fab
- fabulous
- famous
- fantabulous [slang]
- fantastic
- fine
- first-class
- first-rate
- first-string
- five-star
- four-star
- frontline
- gangbusters
- gangbuster
- gilt-edged
- gilt-edge
- gone [slang]
- grand
- great
- groovy
- heavenly
- high-class
- hot
- hype [slang]
- immense
- jim-dandy
- keen
- lovely
- marvelous
- marvellous
- mean
- neat
- nifty
- noble
- number one
- No. 1
- numero uno
- out-of-sight [slang]
- par excellence
- peachy
- peachy keen
- phat [slang]
- prime
- primo [slang]
- prize
- prizewinning
- quality
- radical [slang]
- righteous [slang]
- sensational
- slick
- splendid
- stellar
- sterling
- superb
- superior
- superlative
- supernal
- swell
- terrific
- tip-top
- top
- top-notch
- top-of-the-line
- top-shelf
- topflight
- topping [chiefly British]
- unsurpassed
- wizard [chiefly British]
- wonderful
Examples of A1 in a Sentence
The car's in A1 condition.
an A1 mom deserves only the very best Mother's Day card
Word History
First Known Use
1801, in the meaning defined at sense 1
Articles Related to A1
Dictionary Entries Near A1
Cite this Entry
“A1.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/A1. Accessed 2 Sep. 2024.
Kids Definition
A1
adjective
: of the very best kind
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Merriam-Webster unabridged
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