- The definition of pac is a tall, insulted, laced boat that protects against water and the cold, or is the abbreviation for a political action committee.
- An example of a pac is a boot a road worker wears during a blizzard.
- An example of a PAC is a political group that accepts funding and supports politicians who are against abortion.
- Archaic a high moccasin; larrigan
- a high, insulated, waterproof, laced boot, for wear in very cold weather
Origin: shortened from shoepac
Used by arrangement with John Wiley & Sons, Inc.
- A moccasin or soft shoe designed to be worn inside a boot.
- A shoepac.
Origin: Short for shoepac, alteration (influenced by shoe) of pidgin Delaware seppock, shoe, from Unami Delaware chípahko, shoes.
pac - Business DefinitionThe American Heritage® Dictionary of Business Terms Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
pac - Computer Definition
(1) See perceptual audio coding.
(2) (Programmable Automation Controller) A programmable microprocessor-based device that is used for discrete manufacturing, process control and remote monitoring applications. Designed for use in rugged, industrial environments, PACs combine the functions of a programmable logic controller (PLC) with the greater flexibility of a PC. They are also more easily set up for data collection and integration with the company's business applications than PLCs. Although each PAC vendor uses its own development environment (IDE) and programming language, PAC networking is typically based on IP and Ethernet. Taking advantage of off-the-shelf microprocessors, PACs were developed in the 1990s to provide a single industrial controller that would provide the functions of a DCS and PLC. The term was coined in 2001 by the ARC Advisory Group (www.arcweb.com). Contrast with PLC and DCS.
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