(business) An investor in a business who by agreement or otherwise can not take an active role in the management of the business.

A form of liquid crystal display in which the pixels must maintain their state without active driving circuitry until they are next refreshed, contrasted with active matrix.

plural of passive matrix

The words and phrases, collectively, that someone understands in speech and writing but does not commonly use.

The inhalation of tobacco smoke by a non-smoker due to proximity to smokers.

(Britain, Canada) Shielding that is chemically inert (unlike reactive armour) and does not require electricity or active sensors to operate. It is usually made of metal, ceramic, or in some cases, composite materials.

(grammar) The form of a transitive verb in which its subject receives the action.

A receive-only radar that uses ambient radio signals for search, tracking, surveillance, identification, guidance and mapping.

(immunology) The translocation of active humoral immunity from one individual to another in the form of custom-made antibodies.

(chemistry) Iron that has been subjected to the action of heat, strong nitric acid, chlorine, etc. It is then not easily acted upon by acids.