only

/ˈoʊnli/
adjective
  1. Having no sibling or no other; sole.
    • This is the only copy of the book in the library.
    • He was the only person who knew the truth.
    • She is an only child.
  2. Best or most suitable; unmatched.
    • She is the only person for the job.
    • This is the only way to solve the problem.
    • He is the only friend I trust completely.
Synonyms
Antonyms
adverb
  1. And nothing more; no more than; just.
    • I only have five dollars left in my wallet.
    • She only wanted to help, but he misunderstood.
    • The store is open only on weekdays.
  2. No one or nothing except; exclusively.
    • Only members can enter the VIP lounge.
    • Only after the rain stopped did we go outside.
    • He only eats vegetables — no meat or dairy.
  3. Used to emphasize that something is small, unimportant, or not serious.
    • It's only a scratch, not a deep cut.
    • Don't worry — it's only a test.
    • She's only a child; she doesn't understand.
conjunction
  1. Used to introduce a reason or condition that limits what was just said; except that.
    • I would go, only I'm too tired.
    • She would have won, only she tripped at the finish line.
    • He'd be perfect for the role, only he can't sing.