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expansion slot

noun, Computers.
a connection in a computer, especially a personal computer, to which a new board or card can be added to expand the computer's capabilities.
Origin of expansion slot
1980-85 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for expansion-slot

expansion slot

a physical electronic interface provided in a computer system to enable extra facilities to be added easily at a later date
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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