Search engine is basically a technique that how the webmaster directly submit the website to the search engine like google,yahoo,Bing,yelp etc.

Search engine submission is an effective tool of web promotion. It refers to the direct submission of a website to a search engine. It is a form of internet marketing that helps a webmasters increase the rankings of a web pages or pages. The search engine submission process is done through two methods primarily. The first method is submitting one page at a time by using various webmaster tools such as Google Webmaster Central or Bing Webmaster Tools and by generating an up to date sitemap file along with a robots text file. The second one requires submission of the entire site by submitting the home page and home page only to as many search engines as possible which is a mass submission process

Search engine submission is the process of providing information to a search engine (or the company that manages the search engine) so that it can be added to their index of sites that will be displayed when users search for information.
The act of supplying a URL to a search engine in an attempt to make a search engine aware of a site or page.

Great and informative conversation..

It's the process of submitting your website or blogs link to search engines.

search engine submission is a process under which a website is submitted to search engine .

Good Information !!! Specially thanks to Serpholic for the wonderful answer !!