on·ly
[ohn -lee]

adverb
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.

adjective
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.

conjunction
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.

Idiom
10. only too,
     a. as a matter of fact; extremely: I am only too glad to go.
     b. unfortunately; very: It is only too likely to happen.