- capable of or designed for being connected to an electrical power source by plugging in or inserting: a plug-in hair dryer; a plug-in transistor.
Origin of plug-in
First recorded in 1920–25; adj., noun use of verb phrase plug in
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for plug-in
California alone already has more than 100,000 plug-in vehicles.
With each passing month, about 11,000 new all-electric or plug-in hybrid vehicles hit the road.
But last month, carbuyers could choose from well over 50 different types of hybrids, including seven plug-in hybrids.Hybrid Cars Are Niche No More
The Daily Beast
June 6, 2014
Mitsubishi is bringing a plug-in electric hybrid to the U.S. in 2015.Tesla’s Rise Forces Other Automakers to Up Their Electric Car Game
September 25, 2013
While they account for only a tiny fraction of sales, electric vehicles and plug-in hybrids are rising.Sales Increase for Electric Vehicles
July 2, 2013
Word Origin and History for plug-in
Online Etymology Dictionary, © 2010 Douglas Harper
- An accessory software or hardware package that is used in conjunction with an existing application or device to extend its capabilities or provide additional functions.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.