What does capacitively mean?
"Capacitively" is a technical adverb meaning "involving capacitance" or "by means of a capacitor." It appears almost exclusively in electronics and physics, where it most often describes how two parts of a circuit are connected: components that are capacitively coupled exchange signals through an electric field across a dielectric — typically a capacitor — rather than through a direct conductive path, which allows alternating-current signals to pass while blocking direct current. The word also characterizes sensing technologies: many touchscreens and fingerprint readers work capacitively, detecting the tiny change in capacitance caused by a conductive object such as a human finger approaching the surface. Because it derives from "capacitance," the measure of a component's ability to store electric charge, its meaning stays firmly anchored to electrostatic phenomena. It carries a formal, specialist tone and has no place in casual speech; writers outside technical fields will rarely need it, but in engineering prose it is the standard and precise choice for distinguishing capacitive mechanisms from resistive, inductive, or conductive ones.
adverbIn a manner involving or relating to capacitance; by means of capacitive coupling or a capacitor-based mechanism.
- (Of a connection or coupling) through capacitive coupling, i.e. via an electric field rather than direct conduction.
- (Of sensing, measurement, or operation) by means of changes in capacitance.
"The sensor detects the touch capacitively, without any physical pressure on the screen."
"The two circuit stages are linked capacitively, so DC signals are blocked while AC passes through."
"Modern fingerprint sensors read the ridges of the fingertip capacitively."
Every swipe you make on a smartphone screen works because your finger is being read capacitively — the device literally senses the electrical field of your body.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of capacitively
The word derives from "capacitive," itself built on "capacitance," which was coined in the late 19th century from "capacity," ultimately rooted in Latin "capax" ("able to hold much"), from "capere" ("to take, contain"). As electrical science developed, "capacitance" named a component's ability to store charge, and the adverb "capacitively" followed as the standard way to express action or connection through that property. It thus shares its Latin root with words like "capacity" and "capacious."
Related word forms
How capacitively is actually used
A technical adverb used almost exclusively in electronics, physics, and engineering contexts; it is rare in everyday conversation and belongs to formal or specialist register.
Easily confused with capacitively
Inductively describes coupling or transfer via magnetic fields (inductance), whereas capacitively describes coupling via electric fields (capacitance).