Webster's Dictionary is any of the English language dictionaries edited in the early 19th century by American lexicographer Noah Webster, as well as numerous related or unrelated dictionaries that have adopted the Webster's name in honor.

Could definition and examples?

The definition of could is often used in the place of "can" to show a little doubt. An example of could is someone asking if they can help someone. An example of could is saying that something is able to happen if someone does something.

Is could of wrong?

You should never use could of. It is a mistake by careless writers that results from a misunderstanding of spoken English. Since could have is a verb phrase, and of is preposition, you will always know to use could have as long as you can remember the parts of speech of have and of.