According to Merriam-Webster Dictionary:
: a usually large collection of data organized especially for rapid search and retrieval (as by a computer)
Sources published by well-known publishing companies, universities, research groups, etc. -- such as:
Here's a list of all of the databases available for you to use: A - Z Databases
Search dozens of databases and the library catalog. Find articles, books, eBooks, videos, and more. This cross-curricular research database supports science, social studies, current events, and language arts classes. Informed, differing views help learners develop criticalthinking skills and draw their own conclusions.