Share this entry

Share this page

reactive

Syllabification: re·ac·tive
Pronunciation: /rēˈaktiv
 
/

Definition of reactive in English:

adjective

1Showing a response to a stimulus: pupils are reactive to light
More example sentences
  • Is the measles virus reactive to ultra violet light?
  • The reactive response is when my ego is offended.
  • I was a bit surprised to read the reactive / defensive response of some of my classmates.
1.1Acting in response to a situation rather than creating or controlling it: a proactive rather than a reactive approach
More example sentences
  • The leaders who built enduring great companies showed a creative inside-out approach rather than a reactive outside-in approach.
  • The key is to be proactive rather than reactive taking a firm stance before the situation gets out of hand.
  • Much of Cuba's Internet control strategy has entailed reactive state responses to the challenges outlined above.
1.2Having a tendency to react chemically: nitrogen dioxide is a highly reactive gas
More example sentences
  • Ozone is produced when sunlight triggers chemical reactions involving reactive hydrocarbons and nitrogen oxides.
  • A molecule's functional group is the chemically reactive portion, or segment, of an organic chemical molecule.
  • At room temperature, formaldehyde is an extremely reactive colorless gas with a suffocating odor.
1.3 Physiology Showing an immune response to a specific antigen.
Example sentences
  • Several methods are available to prevent the formation of preformed reactive antibodies to HLA antigens.
  • Arrows indicate cells reactive to the zeatine specific antibodies.
  • Eyebright appears to make your immune system less reactive to airborne allergens.
1.4(Of a disease or illness) caused by a reaction to something: reactive arthritis reactive depression
More example sentences
  • Reiter's syndrome is a form of reactive arthritis, an inflammation of the joints that occurs in response to infection.
  • The histologic causes of these false-positive lymph nodes were granuloma, reactive inflammation, and anthracosis.
  • The etiology of a pulmonary exacerbation is likely a variety of airway insults including respiratory viral infections, reactive airway disease, and pollutants.
1.5 Physics Of or relating to reactance: a reactive load
More example sentences
  • It is important to remember that any reactive load will produce standing waves on the line.
  • There are separate accumulators for generator tripping and 500-kV reactive power compensation switching for this algorithm as well.
  • Generator tripping must be technically and contractually feasible, and the reactive power devices must be in place.

Definition of reactive in:

Share this entry

Share this page

 

What do you find interesting about this word or phrase?

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day verbose
Pronunciation: vəːˈbəʊs
adjective
using more words than are needed…