#1
reaction n. [
chemical 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"
. wn #2
reaction n. an idea evoked by some experience; "his reaction to the news was to start planning what to do"
. wn #3
reaction n. [
response] a bodily process occurring due to the effect of some antecedent stimulus or agent; "a bad reaction to the medicine"; "his responses have slowed with age"
. wn #4
reaction n. (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"
. wn #5
reaction n. 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"
. wn