I'd like to know the difference in the meaning between "based on" and "based off".

I can not find "based off " in my English dictionaries.

Thank you very much. H. Shimoya
I don't think that "based off" by itself could be considered a common collocation.

Perhaps "The newspaper was based off-campus."

If I said something like, "All the missiles are based underground,"

you would not necessarily expect to find a dictionary entry for "based underground."

We're talking about two different senses of "to base."

"Based on" means "founded on."

"The company is based in Vermont." = "The company has it's headquarters/base in Vermont."

Do you have an example sentence using "based off"?

- A.

I can't think of a verb phrase where "off" is added to "base"

As Avangi has shown, the two words sometimes come together with "base" plus adverbial phrase..

- Our submarine was based off the coast of Scotland

You can tell the difference in questions, where the "on" or "off" fall naturally..

- What is the play based on?

- My life in America

-Where were you based?

- Off the coast of Scotland

Regards, Dave