Definition of react in English:

react

verb

[NO OBJECT]
  • 1Respond or behave in a particular way in response to something.

    ‘he reacted angrily to the news of his dismissal’
    ‘the market reacted by falling a further 3.1%’
    • ‘Your body was reacting the way it was designed to do - with pleasure.’
    • ‘According to critics, established Democratic consultants are not reacting fast enough to changing conditions.’
    • ‘Their daughter was told about the explosion and reacted with shock when she arrived.’
    • ‘I honestly can't imagine why no one on the show reacts in a similar fashion.’
    • ‘Finally, we examine whether investors react rationally to disaster announcements.’
    • ‘Why did the government react so violently to the report?’
    • ‘Ward councillors have reacted with dismay, saying it will mean the end of historical links.’
    • ‘Do you think a bunch of guys would have reacted in the same manner?’
    • ‘One reason is that financial markets react quickly to policy changes.’
    • ‘All my three daughters react differently to stress.’
    • ‘Sun's shares quickly fell by about 6 per cent in after-hours trading, as investors reacted to the quarterly report.’
    • ‘Gay political groups have reacted with horror, attacking the lead researcher himself as biased.’
    • ‘United fans reacted with fury at the announcement.’
    • ‘But the links are just harder to study, because everybody reacts to stress differently.’
    • ‘Males reacted equally strongly to both stimuli for all four parameters.’
    • ‘But Edinburgh City Council has reacted angrily to suggestions that they may have deliberately clogged the streets.’
    • ‘The powers-that-be are scrambling to react to pressure from a dissatisfied public.’
    • ‘Most people would react negatively to these situations and Ian was no exception.’
    • ‘If other readers react in the same way as I did, then this collection will have served its purpose.’
    • ‘Rail passengers have reacted angrily to news that fares are set to rise.’
    behave, act, take it, conduct oneself, proceed
    rebel against, oppose, revolt against, rise up against
    View synonyms
    1. 1.1react against Respond with hostility, opposition, or a contrary course of action to.
      ‘they reacted against the elite art music of their time’
      • ‘We were reacting against bands we considered to be turgid and boring.’
      • ‘‘We've reacted against what's happened in those big studios,’ says Shaw.’
      • ‘Whether you are repeating them or reacting against them could be explored further.’
      • ‘It seems to be reacting against the conventional attitudes of intellectuals at least those raised in the Western tradition.’
      • ‘Third, many people in the younger generation, under age 30 or so, are reacting against the culture of divorce.’
      • ‘I cannot help reacting against all the negative criticism of the regime that one hears in England.’
      • ‘Superficially he reacted against this background.’
      • ‘And, once again, traditionalists are reacting against globalization just as vehemently, if not more so, as they did against modernity.’
      • ‘A lot of the Victoria bands that started around 2000 were reacting against the insular hardcore scene out there.’
      • ‘Workers reacted against the outrageous contract demands of the company, voting by an overwhelming 48 to 3 for strike action.’
      • ‘Plus, people who fervently believe in stupid ideas have a quite consistent track record into reacting against dissent with violence.’
      • ‘But at least it tried to offer what it thought was a coherent alternative to the society it was reacting against.’
      • ‘There appears to be a growing disquiet about the recent actions and opinions of America that many people are reacting against.’
      • ‘He is a player who gets a lot of challenges against him and he has to resist reacting against them and keep playing the game.’
      • ‘How do we react against such violence and war in our time?’
      • ‘The second neat thing we learn is that the rioters aren't reacting against capitalism.’
      • ‘In part, that is what Muslim fundamentalists are reacting against.’
      • ‘The positive side being, they could not be stopped from reacting against portions they disliked.’
      • ‘The French have reacted against a document they think is an Anglo-Saxon plot to move away from a ‘social’ Europe.’
      • ‘So post-punk is music which is reacting against punk, consciously trying to move beyond it.’
    2. 1.2 (of a person) suffer from adverse physiological effects after ingesting, breathing, or touching a substance.
      ‘many babies react to soy-based formulas’
      • ‘Why do some members of a family react to environmental substances and develop asthma, while others do not?’
      • ‘Our findings indicate that children at risk for atopy react sensitively to chemical substances that originate from passive smoking.’
      • ‘One of the hardest questions for parents of a young child to answer is whether to have them further immunized when he or she has reacted to a vaccination in the past.’
      • ‘Therefore you can suddenly react to a substance you may have come in contact with many times before.’
      • ‘Those who react to airborne allergens usually have allergic rhinitis and/or allergic conjunctivitis.’
    3. 1.3Chemistry Physics Interact and undergo a chemical or physical change.
      ‘the sulfur in the coal reacts with the limestone during combustion’
      • ‘Direct sensing mechanisms might involve proteins or ligands that bind or react with oxygen.’
      • ‘In these reactions the ozone reacts with nitric oxide to produce nitrogen dioxide.’
      • ‘When base is added, it reacts with hydronium ion to decrease its concentration, thereby stressing the system.’
      • ‘At higher temperatures, magnesium reacts vigorously with oxygen to produce a blinding white light.’
      • ‘Thus, it is unsurprising that rubisco still reacts with both oxygen and carbon dioxide.’
    4. 1.4Chemistry with object Cause (a substance) to undergo a change by interacting with another substance.
      • ‘These materials are reacted with sulfuric acid, then neutralized, and converted to a salt.’
      • ‘It is made into MSG by reacting the glutamic acid crystals with sodium hydroxide.’
      • ‘Many alkyl halides, alcohols, or alkenes can be reacted with benzene in the presence of certain catalysts to give an alkyl benzene.’
      • ‘Organic sulfates are esters and are formed by reacting an alcohol with cold sulfuric acid or by the reaction of sulfuric acid with a double bond in an alkene.’
      • ‘Chloroform can be made from ethanol by reacting the ethanol with calcium hypochlorite.’
    5. 1.5Stock Market (of stock prices) fall or rise in reaction to events, developments, etc.
      • ‘The market reacted positively to the news, pushing BHP's price up 1.5 per cent, to $17.42.’
      • ‘The stock price is reacting, up some 50 percent to $15 a share since Payne took charge.’
      • ‘The market reacted badly to the news and sent the shares 17 % lower.’
      • ‘Edging down a bit from record highs, but maybe not for long, oil prices react to events in Iraq.’
      • ‘Just how will bond markets and stock markets react to the anticipated rise in US interest rates?’

Origin

Mid 17th century: from re- (expressing intensive force or reversal) + act, originally suggested by medieval Latin react- ‘done again’, from the verb reagere.

Pronunciation

react

/rēˈakt//riˈækt/