What is the meaning of Reactor?

A person who responds to a suggestion, stimulation or other influence.

A structure used to contain chemical or other reactions.

A device which uses atomic energy to produce heat.

A chemical substance which responds to the presence of, or contact with, another substance.

An electrical component with reactance

atomic reactor

chemical reactor

pre-reform spelling (used until 1943 in Brazil and 1990 in Portugal) of reator; still used where the agreement hasn’t come into effect and may occur as a sporadic misspelling

reactor

jet engine

rocket engine

atomic reactor

chemical reactor

Source: wiktionary.org