Толковый словарь английского языка - activate

verb (-vated; -vating) Date: 1626 transitive verb to make active or more active: as, a. to make (as molecules) reactive or more reactive, to convert (as a provitamin) into a biologically active derivative, to make (a substance) radioactive, to treat (as carbon or alumina) so as to improve adsorptive properties, d. to set up or formally institute (as a military unit) with the necessary personnel and equipment, to put (an individual or unit) on active duty, intransitive verb to become active, activation noun activator noun