electrostaticPronunciation: /ɪˌlɛktrə(ʊ)ˈstatɪk/Definition of electrostatic adjective Physics relating to stationary electric charges or fields as opposed to electric currents. Derivatives electrostatically adverb Origin: mid 19th century: from electro- + static, on the pattern of hydrostaticelectrostatic in other Oxford dictionaries Definition of electrostatic in the US English dictionary