We have only two sandwiches left.
An example of only used as an adjective is in the phrase "the only house left standing," which means the house is by itself.
This is the only way to cook a good steak.
Facts known only to us.
We would have reached the summit, only the weather got bad.
An only child.
To meet one crisis, only to face another.
Elected only last fall.
I'd have gone, only it rained.
He is the only doctor for miles.
The only people in the stadium were the fans: no players, coaches, or officials.
Only the cat sat on the mat. The dog never did.
The only cat sat on the only mat.
The cat only sat on the mat. It didn't scratch it. If there were only one more ticket!
He left only moments ago.
I would enjoy running, only I have this broken leg.
The cat sat on the mat, only the dog chased it off.
An example of only used as an adverb is in the phrase "only walking," which means doing nothing other than walking.
An example of only used as a conjunction is in the sentence "I would have eaten that hamburger, only it was undercooked," which means "I would have eaten that hamburger, but it was undercooked."
- would that; I wish thatif only they would leave; if they would only try harder.
- very; exceedingly
Origin of only
From American Heritage Dictionary of the English Language, 5th Edition