Oxford Dictionary English network effect noun noun BrE BrE//ˈnetwɜːk ɪfekt// ; NAmE NAmE//ˈnetwɜːrk ɪfekt// (economics) Add to my wordlistjump to other resultsthe effect that happens when a product or service gains value as more people use it The network effect is often the result of word-of-mouth testimonials.Check pronunciation: network effect oxfordlearnersdictionaries.com