reactive
/ri:'æktiv/
Definition
- Adjective:
- Reacting to a stimulus: Describing something that responds or changes when acted upon by an external force or event.
- Participating readily in reactions: In chemistry and physics, describing a substance or element that tends to undergo chemical reactions easily or vigorously.
Usage and Examples
- Adjective:
- The patient's reactive pupils indicated a healthy neurological response. (Here, 'reactive' describes pupils that change in response to light.)
- Sodium is highly reactive with water. (Here, 'reactive' describes a chemical property of sodium, meaning it undergoes a reaction easily.)
- The new security system is reactive, activating only after a breach is detected. (Here, 'reactive' describes a system that responds to an event.)
Advanced Usage
Reactive Attachment Disorder: A psychological condition where a child has difficulty forming emotional bonds due to neglect.
- The therapist specialized in treating children with reactive attachment disorder.
Reactive Power: In electrical engineering, power that oscillates between the source and load in AC systems.
- Capacitors are used to correct for reactive power in the circuit.
Variants and Related Words
- React (verb): To act in response to something.
- How did he react to the news?
- Reactivity (noun): The state or degree of being reactive.
- The experiment measured the metal's reactivity.
- Hyperreactive (adj): Abnormally or excessively reactive.
- He has a hyperreactive airway, which makes him prone to asthma attacks.
Synonyms
- Responsive: Reacting quickly and positively.
- Sensitive: Quick to detect or respond to slight changes.
- Volatile: In chemistry, easily evaporated or changing; can imply a tendency to react unpredictably.
Antonyms
- Inert: Lacking the ability or strength to move or react.
- Unresponsive: Not reacting or responding.
- Stable: Not easily decomposed or changed; not readily participating in reactions.
Related Phrases and Concepts
- Reactive approach: A strategy focused on responding to events after they occur, as opposed to preventing them.
- A purely reactive approach to maintenance leads to more downtime.
- Reactive depression: Depression that is an understandable reaction to an external event, such as a loss.
- Her grief was diagnosed as a case of reactive depression.
Adjective
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reacting to a stimulus
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the skin of old persons is less reactive than that of younger persons
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participating readily in reactions
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sodium is a reactive metal
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free radicals are very reactive
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