/ Thesaurus / P Synonyms of plug in Find synonyms for: Noun1. circuit board, circuit card, board, card, plug-in, add-in, printed circuitusage: a printed circuit that can be inserted into expansion slots in a computer to increase the computer's capabilitiesVerb1. plug in, plug into, connect, insert, infix, enter, introduceusage: plug into an outlet; "Please plug in the toaster!"; "Connect the TV so we can watch the football game tonight"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language