| 1. | without others or anything further; alone; solely; exclusively: This information is for your eyes only. |
| 2. | no more than; merely; just: If it were only true! I cook only on weekends. |
| 3. | as recently as: I read that article only yesterday. |
| 4. | in the final outcome or decision: You will only regret your harsh words to me. |
| 5. | being the single one or the relatively few of the kind: This is the only pencil I can find. |
| 6. | having no sibling or no sibling of the same sex: an only child; an only son. |
| 7. | single in superiority or distinction; unique; the best: the one and only Muhammad Ali. |
| 8. | but (introducing a single restriction, restraining circumstance, or the like): I would have gone, only you objected. |
| 9. | Older Use. except; but: Only for him you would not be here. |
| 10. | only too,
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only too
At the very least, as a matter of fact, as in I know only too well that I can't win the lottery. This usage was first recorded in 1817.
Very, extremely, as in I am only too glad to help. This usage was first recorded in 1899.