Longman Dictionary of Contemporary English homepage

Language: Old English
Origin: anlic, from an; ONE3

only

2 adjective
     
only2 S1 W1 [only before noun]
1 used to say that there is one person, thing, or group in a particular situation and no others:
I was the only woman there.
He is our only child.
I was the only one who disagreed.
Cutting costs is the only solution.
She's the only person for this job.
2

the only thing/problem is ...

spoken used when you are going to mention a problem or disadvantage:
I could take you. The only thing is Dan might need the car.
3

an only child

a child who has no brothers or sisters

➔ the one and only

at one4 (2)

; ➔ (only) time will tell

at time1 (36)

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