What does capacitive mean?
"Capacitive" is a technical adjective meaning relating to capacitance — the capacity of a system or component to store electric charge. In physics and electronics, it describes anything that behaves like a capacitor, storing energy in an electrostatic field between conductors separated by an insulating material called a dielectric. The word is most familiar to the general public through consumer technology: modern smartphones and tablets use capacitive touchscreens, which detect the position of a finger by sensing small changes in an electrical charge at the screen's surface, rather than relying on physical pressure as older resistive screens did. The term also appears in engineering contexts such as capacitive coupling, where signals transfer between circuits via charge storage, and capacitive sensors, which detect proximity, moisture, or level changes. Derived from the Latin root capax, meaning able to hold much, "capacitive" carries a precise, scientific connotation and is essentially confined to formal and technical registers.
adjectiveRelating to or having the property of capacitance, the ability of a component or system to store an electric charge. Most commonly used to describe touchscreens, sensors, and other devices that detect changes in electrical charge.
- Relating to capacitance: having or involving the ability to store electric charge (used chiefly in electronics and physics).
"Modern smartphones use capacitive touchscreens that respond to the faint electrical conductivity of a fingertip."
"The keyboard's capacitive keys register input without any mechanical travel."
"Capacitive coupling allowed the signal to pass between the circuits without a direct connection."
Every time your finger glides across a phone screen, you're completing a capacitive circuit — the device literally senses the tiny charge in your body.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of capacitive
"Capacitive" derives from "capacitance," itself formed from the Latin root capax, meaning "able to hold or contain much," which also gives English "capacity" and "capacious." The adjective emerged in the late nineteenth century alongside the development of electrical science, when physicists needed precise terminology for a component's charge-storing property. It is thus a true cognate family with "capacity" and "capacious," all tracing back through Latin capere, "to take or hold."
Related word forms
How capacitive is actually used
A technical term used almost exclusively in electronics, physics, and engineering contexts; it rarely appears in general prose except in descriptions of touchscreens and sensors.
Easily confused with capacitive
Capacitive effects arise from stored electric charge between conductors, while inductive effects arise from magnetic fields generated by current flow.