lookup definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
A procedure in which a table of values stored in a computer is searched until a specified value is found.
lookup - Computer Definition
A data search performed within a predefined table of values (array, matrix, etc.) or within a data file.