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";
