• doing something in opposition to another way of doing it that you don''t like; "his style of painting was a Reaction against cubism"
• a bodily process occurring due to the effect of some foregoing stimulus or agent; "a bad Reaction to the medicine"; "his responses have slowed with age"
• an idea evoked by some experience; "his Reaction to the news was to start planning what to do"
• extreme conservatism in political or social matters; "the forces of Reaction carried the election"
• a response that reveals a person''s feelings or attitude; "he was pleased by the audience''s Reaction to his performance"; "John feared his mother''s Reaction when she saw the broken lamp"
• (mechanics) the equal and opposite force that is produced when any force is applied to a body; "every action has an equal and opposite Reaction"
• (chemistry) a process in which one or more substances are changed into others; "there was a chemical Reaction of the lime with the ground water"

'Reaction' in other languages