A website that helps you find information on the internet by typing keywords. Like a librarian who can instantly find any book or information you need.
Google, Bing, and Yahoo are search engines that help you find websites, images, and answers to questions.
A search engine (like Google or Bing) is a consumer web service, not a single cloud provider product. Cloud providers offer search technologies you can build into apps (e.g., site/app search), but they are not equivalents to public web search engines.