Longman Dictionary of Contemporary English
Wiktionary
n. (context idiomatic business English) The property or characteristic of a good that most attracts purchasers.
WordNet
n. a characteristic of something that is up for sale that makes it attractive to potential customers
Usage examples of "selling point".
What they actually wanted, though, was a large sample of metastasizing cells so they could perfect the biggest selling point of the Health-Guard: cancer protection.
His main selling point will be that you aren't buying, you're investing If everything turns out right, eventually you'll get back what you put in, or a substantial part of it.
You would have more space, you would be close to your selling point, you could increase your production, have better housing, better .
Perhaps informality is a selling point, he tells himself, looking hopefully at his guests.
So I explained that since these days, dual airbags are such a big selling point for car buyers, why shouldn't the concept appeal to book buyers as well?
He made a major selling point of the fact that he put his product in clear glass bottles, thus demonstrating that he did not adulterate his sauce with turnips or other false vegetables, as his competitors did.