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Definitions and Synonyms of reaction | Another word for reaction | What is reaction?

Definition 1: a bodily process occurring due to the effect of some antecedent stimulus or agent - [noun denoting act]

Samples where reaction or its synonyms are used according to this definition

  • a bad reaction to the medicine
  • his responses have slowed with age

Synonyms for reaction in the sense of this definition

(reaction is a kind of ...) an organic process that takes place in the body

"respiratory activity"

(... is a kind of reaction ) reaction of the body to a transfusion of blood that is not compatible with its own blood; an adverse reaction can range from fever and hives to renal failure and shock and death

(... is a kind of reaction ) a nonverbal reaction

"his answer to any problem was to get drunk" "their answer was to sue me"

(... is a kind of reaction ) a bodily reaction of changing from one place or stage to another

"the passage of air from the lungs" "the passing of flatus"

(... is a kind of reaction ) a reaction that has been acquired by learning

(... is a kind of reaction ) an automatic instinctive unlearned reaction to a stimulus

(... is a kind of reaction ) a delayed reaction indicating surprise

(... is a kind of reaction ) a movement that is a response to a stimulus but is not oriented with respect to the source of stimulation

(... is a kind of reaction ) a locomotor response toward or away from an external stimulus by a motile (and usually simple) organism

(... is a kind of reaction ) an involuntary orienting response; positive or negative reaction to a stimulus source

(... is a kind of reaction ) a bodily defense reaction that recognizes an invading substance (an antigen: such as a virus or fungus or bacteria or transplanted organ) and produces antibodies specific against that antigen

(... is a kind of reaction ) a change in the electrical properties of the skin in response to stress or anxiety; can be measured either by recording the electrical resistance of the skin or by recording weak currents generated by the body

(... is a kind of reaction ) an excessive reaction; a reaction with inappropriate emotional behavior

(... is a kind of reaction ) a reaction to a crisis or setback or frustration

"he is still on the rebound from his wife's death"

(... is a kind of reaction ) any reaction that occurs automatically without conscious thought or reflection (especially the undirected behavior seen in psychomotor epilepsy)

Definition 2: doing something in opposition to another way of doing it that you don't like - [noun denoting act]

Samples where reaction or its synonyms are used according to this definition

  • his style of painting was a reaction against cubism

(reaction is a kind of ...) the action of opposing something that you disapprove or disagree with

"he encountered a general feeling of resistance from many citizens" "despite opposition from the newspapers he went ahead"

(... is a kind of reaction ) an adverse reaction to some political or social occurrence

"there was a backlash of intolerance"

Definition 3: an idea evoked by some experience - [noun denoting cognition]

Samples where reaction or its synonyms are used according to this definition

  • his reaction to the news was to start planning what to do

(reaction is a kind of ...) the content of cognition; the main thing you are thinking about

"it was not a good idea" "the thought never entered my mind"

Definition 4: extreme conservatism in political or social matters - [noun denoting cognition]

Samples where reaction or its synonyms are used according to this definition

  • the forces of reaction carried the election

(reaction is a kind of ...) a political or theological orientation advocating the preservation of the best in society and opposing radical changes

Definition 5: (mechanics) the equal and opposite force that is produced when any force is applied to a body - [noun denoting phenomenon]

Samples where reaction or its synonyms are used according to this definition

  • every action has an equal and opposite reaction

(reaction is a kind of ...) (physics) the influence that produces a change in a physical quantity

"force equals mass times acceleration"

(reaction belongs to category ...) the branch of physics concerned with the motion of bodies in a frame of reference

Definition 6: a response that reveals a person's feelings or attitude - [noun denoting phenomenon]

Samples where reaction or its synonyms are used according to this definition

  • he was pleased by the audience's reaction to his performance
  • John feared his mother's reaction when she saw the broken lamp

(reaction is a kind of ...) a result

"this situation developed in response to events in Africa"

Definition 7: (chemistry) a process in which one or more substances are changed into others - [noun denoting process]

Samples where reaction or its synonyms are used according to this definition

  • there was a chemical reaction of the lime with the ground water

Synonyms for reaction in the sense of this definition

(reaction is a kind of ...) (chemistry) any process determined by the atomic and molecular composition and structure of the substances involved

(... is a kind of reaction ) a chemical reaction accompanied by the evolution of heat

(... is a kind of reaction ) a chemical reaction in which water reacts with a compound to produce other compounds; involves the splitting of a bond and the addition of the hydrogen cation and the hydroxide anion from the water

(... is a kind of reaction ) a chemical reaction in which an acid and a base interact with the formation of a salt; with strong acids and bases the essential reaction is the combination of hydrogen ions with hydroxyl ions to form water

(... is a kind of reaction ) a chemical reaction in which an ester is heated with an alkali (especially the alkaline hydrolysis of a fat or oil to make soap)

(... is a kind of reaction ) the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reduction

(... is a kind of reaction ) a reversible chemical reaction in which one reaction is an oxidation and the reverse is a reduction

(... is a kind of reaction ) a chemical reaction produced by the action of light

(... is a kind of reaction ) any process in which electrons are added to an atom or ion (as by removing oxygen or adding hydrogen); always occurs accompanied by oxidation of the reducing agent

(... is a kind of reaction ) a chemical reaction accompanied by the absorption of heat

(... is a kind of reaction ) a chemical reaction in which a molecule decomposes to two different molecules

(... is a kind of reaction ) a chemical reaction between two compounds in which parts of each are interchanged to form two new compounds (AB+CD=AD+CB)

(... is a kind of reaction ) (chemistry) a reaction in which an elementary substance displaces and sets free a constituent element from a compound

(... is a kind of reaction ) (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance

(... is a kind of reaction ) a chemical reaction and its reverse proceed at equal rates

(... is a kind of reaction ) a series of chemical reactions in which the product of one is a reactant in the next

(... is a kind of reaction ) a reaction of aldehydes resulting in an aldol

(... is a kind of reaction ) a chemical reaction in which one molecule is added to another

(reaction belongs to category ...) the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions

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