Passive has several meanings:

• In grammar it describes a grammatical voice.
• In electronics it describes components, circuits or pieces of equipment that perform no amplification and consume no power other than from the signal itself. See DI unit, electric guitar.
• in any sexual activity involving penetration, passive refers to the receiving party, and active to the penetrating on

It is in all sense the opposite to active Grammar is the discovery, enunciation, and study of rules governing the use of language. ... In grammar, voice is the relationship between the action or state expressed by a verb, and its arguments (subject, object, etc. ... Two digital voltmeters The field of electronics is the study and use of electronic devices that operate by controlling the flow of electrons or other electrically charged particles in devices such as thermionic valves and semiconductors. ... A DI unit or DI box is an electronic device designed for connecting a piece of equipment with an electronic audio output to a standard microphone or line level input. ... An electric guitar is a type of guitar with a solid or semi-solid body that utilizes electromagnetic pickups to convert the vibration of the steel-cored strings into electrical current. ... active active lifestyle active volcano sexually active, meaning to regularly undertake sexual activity active grammatical voice active electronics are components, circuits or units of equipment that consume power other than the signal itself, most normally to provide amplification. ...