The American Heritage® Dictionary of the English Language, 4th Edition
n. An electric circuit element used to store charge temporarily, consisting in general of two metallic plates separated and insulated from each other by a dielectric. Also called condenser.
n. An electronic component capable of storing an electric charge; especially one consisting of two conductors separated by a dielectric.
the GNU version of the Collaborative International Dictionary of English
n. a device used in electronic circuits to hold electrical charge, consisting of two conducting plates separated by a nonconducting (dielectric) medium; it is characterized by its capacitance.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. an electrical device characterized by its capacity to store an electric charge
Word Usage
"Video explains what a capacitor is and how to make one - Boing Boing make video about visible sound and vibration"