only one
Nothing else exists
Only one emphasizes singular exclusivity—that no others exist or apply: There's only one way to find out.
The phrase often carries emotional weight, suggesting uniqueness or irreplaceability: You only get one life, She's the only one who understands.
It can also express limitation or disappointment: I only have one left.
- irreplaceableHaving no adequate substitute
- individualOne separate human being
- singleOne in number
- rareSeldom found or seen
- soleFoot's bottom surface
lone · nonpareil · solitary · unshared · inimitable · exceptional · unique · unparalleled · unitary · monopolized · exclusive · limited edition · distinct · unrepeatable · standalone · sui generis · simply · merely