Meaning of PARALLEL in English

PARALLEL

[adjective]A parallel event or situation is one that is happening at the same time as and/or is similar to another one.a parallel examplea parallel contestParallel experiments are being conducted in Rome, Paris and London.(specialized) products which are bought unofficially in foreign countries by companies who then sell them more cheaply than usual in your own countryThe tobacco industry loses millions every year due to parallel imports.

Cambridge English vocab.      Кембриджский английский словарь.