for a product

[Silverobama]

Hi.

I love this commercial for Doritos.

I was told by a native speaker of English that "for" here in the sentence means "advertising". But when I looked it up in some dictionaries, I couldn't find its meaning as "advertising". Could you please tell me what it means here in this sentence?

 

[Tarheel]

A commercial for Doritos is a commercial advertising Doritos. That doesn't mean you'll find "advertising" as a definition of "for".

A commercial for something is a commercial advertising that product or service

 

[Silverobama]

A commercial for Doritos is a commercial advertising Doritos. That doesn't mean you'll find "advertising" as a definition of "for".

A commercial for something is a commercial advertising that product or service

Hmm, what does "for" mean in the sentence in the OP?

 

[teechar]

It simply means "related to". It tells you that the commercial is about Doritos.

 

[tedmc]

The preposition "for" means "having the purpose of". Obviously the purpose of a commericial is to advertise a product.

 

[teechar]

The preposition "for" means "having the purpose of".

Yes, but not here.
You find that use of "for" in such sentences as:
I need the dog for protection.
Industrial diamonds are used for making drill bits.

Obviously, the purpose of a commercial is to advertise a product.

That is why the use of "for" here is not the one you mentioned.