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"
give to a charity or good cause; "I donated blood to the Red Cross for the victims of the earthquake"; "donate money to the orphanage"; "She donates to her favorite charity every month"
an improbable and unexpected victory; "the biggest upset since David beat Goliath"
turn from an upright or normal position; "The big vase overturned"; "The canoe tumped over"
cause to overturn from an upright or normal position; "The cat knocked over the flower vase"; "the clumsy customer turned over the vase"; "he tumped over his beer"
the reflex act of ejecting the contents of the stomach through the mouth
the matter ejected in vomiting
eject the contents of the stomach through the mouth; "After drinking too much, the students vomited"; "He purged continuously"; "The patient regurgitated the food we gave him last night"