/ Thesaurus / E Synonyms of expansion slot Find synonyms for: Noun1. slot, expansion slot, receptacleusage: (computer) a socket in a microcomputer that will accept a plug-in circuit board; "the PC had three slots for additional memory"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: illegible Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language