1. A software program that searches a database and gathers and reports information that contains or is related to specified terms.
2. A website whose primary function is providing a search engine for gathering and reporting information available on the Internet or a portion of the Internet.

The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.