Definition of betray in US English:

betray

verb

[with object]
  • 1Expose (one's country, a group, or a person) to danger by treacherously giving information to an enemy.

    ‘a double agent who betrayed some 400 British and French agents to the Germans’
    • ‘‘He has sold out our country and betrayed our national interests,’ a former supporter told me.’
    • ‘I know who the person is [who betrayed him and sent the image on to a wider audience].’
    • ‘By granting them such privilege, aren't Bulgarians betraying national interests?’
    • ‘Not to do so would be to betray the public interest and endanger the police, health service workers and victims.’
    • ‘If I decide to hold a double execution of the hero and an underling who failed or betrayed me, I will see to it that the hero is scheduled to go first.’
    • ‘After all, they were betraying the organization that he had long worked to make greater.’
    • ‘But then the King betrayed her to the enemies of France, to the British, the Normans.’
    • ‘And in the process she betrays all her own careful jurisprudence around race.’
    • ‘Sanctions against the Taliban have merely hardened their resolve not to break with their cultural tradition and betray their honoured guest to their enemies.’
    • ‘This is why he must swear repeatedly that he would never betray American interests to foreign powers: because he will.’
    • ‘Even if that something turned out to be a rather nasty traitor who betrayed his companions, that was still better than being nothing at all.’
    • ‘Saudi Arabia has a long history of betraying the interests of both Israel and the Palestinians, and peacemaking that aims at mollifying the Saudi royal family is doomed to failure.’
    • ‘In spycraft there are four ways to persuade someone to betray their country, known as MICE; Money, Ideology, Coercion & Ego.’
    • ‘So long as racism exists, there will be a need for an independent black politics to make sure that black people's interests are not betrayed.’
    • ‘I suppose often I fall over my own drawn line, but I have to give some help or I would be betraying another ethic… that of being a teacher.’
    • ‘In a characteristic gesture, he made a tape of their confessions and had it distributed as a warning to others who might betray the organization.’
    • ‘There the Son of Man will be betrayed to the chief priests and scribes.’
    • ‘We don't think the United States has any interest whatsoever in betraying the poor Kurds you see for self-interest.’
    • ‘The only branch of humanity who did not make the grade were the planters of the Caribbean islands who chose to betray their class interests because of race considerations.’
    • ‘If I was heir to the throne, they couldn't possibly consciously betray me to the enemy.’
    • ‘Politicians can betray the public interest when it comes into conflict with, and loses to, their own private interests.’
    • ‘Sammy would probably end up betraying him to some enemy, pursuing his own path, or would be murdered by a newly presented enemy.’
    • ‘In every way possible, conservative dogma has betrayed the country.’
    • ‘Control Room gives insight into the concept of journalistic integrity and how each side may see the other betraying that ethic.’
    • ‘There are others who believe they were betrayed by an organization of cheap confidence tricksters and want to tell the world about it.’
    • ‘The newly formed Albanian National Army refused to accept the agreement claiming it betrayed Albanian interests.’
    • ‘Incensed that something as ‘trivial’ as racist abuse could lead to a man losing his job, one reader compared me to the person who betrayed Anne Frank.’
    • ‘If we have done our jobs correctly, Lee should be nearly ready to betray us as a double agent.’
    • ‘The Italian sea defense was betrayed to the Teutons’
    • ‘He became increasingly paranoid that one of his staff would betray him - deliver him alive to the enemy - so much so that he tested the poison on his dog.’
    • ‘Could members of a gang be so myopic that they act in ways that betray their best interests?’
    • ‘The person who actually betrayed Tom was Rupert and he (and those on the Rupert love-train) don't even realise it.’
    • ‘Pakistani intelligence and agents for an American pipeline firm appear to be the puppet masters as the two men become caught up in a clash between the would-be conqueror and an ally who betrays him.’
    • ‘Both of these ideologies have betrayed their promises.’
    • ‘She was made to feel guilty, as if by divulging the most obvious information, she had betrayed him - infringed on his privacy.’
    • ‘The DAB vice-chairman said the democrats had betrayed the interests of the parents and the teachers by voting against the bill.’
    • ‘Did his god help him when his own nephew betrayed him to our enemies?’
    • ‘So to some he is already betraying the interests of small countries and the commission, keeper of the supranational flame, to power-grabbing Brits, Spaniards and French.’
    • ‘That will give heart to their leader, who relies implicitly on such support and it makes unlikely his claim that an internal enemy will flush him out or betray him.’
    • ‘In the end, the records and messages in his mobile phone betray him and his affairs are exposed.’
    break one's promise to, be disloyal to, be unfaithful to, break faith with, play someone false, fail, let down
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    1. 1.1 Treacherously reveal (secrets or information)
      ‘many of those employed by diplomats betrayed secrets and sold classified documents’
      • ‘I trusted Aunt Demeter to look out for my safety, but she betrayed every detail of my running away.’
      • ‘However, sources close to him say they believe the government alleged that he was betraying details of planned NATO airstrikes to the opposition leadership.’
      • ‘None of those who did know her would even consider betraying that information.’
      • ‘He admitted that rumors were circulating that Badr Corps fighters were betraying to the Americans the hiding-places of Mahdi Army officials.’
      • ‘Artie promises not to betray certain details only to show us both the promise and betrayal together.’
      reveal, disclose, divulge, give away, leak, lay bare, make known, uncover, unmask, expose, bring out into the open, tell
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    2. 1.2 Be disloyal to.
      ‘his friends were shocked when he betrayed them’
      • ‘Men fall in love with her, and she betrays and then dumps them.’
      • ‘She suddenly felt that even in knowing James, and in befriending him, that she was betraying Khalid's memory.’
      • ‘A lot of what you see and read on the web requires trust on the part of the reader, and when someone betrays that trust, every reader that bought into the story loses something.’
      • ‘He was highly criticised for this view; some politicians even accused him of betraying the memory of the dead Bulgarian soldiers.’
      • ‘I feel betrayed, as if The Mysterious M has been disloyal in some way.’
      • ‘And the human relationship with this entity is evolving in the moment as people come to terms with a compact broken - a covenant betrayed.’
      • ‘He now feels angry beyond words at ConAgra, misused, betrayed.’
      • ‘The university's actions left me feeling betrayed.’
      • ‘She told the court that upon reading the Mirror article she felt ‘shocked, angry, betrayed and violated’.’
      • ‘The shop that stocks it lies on the site of the old Goldstone Ground and his father refuses even to drive past the shop, let alone betray his club and his friends and their memories by stepping inside it.’
      • ‘You are left feeling feel betrayed, shocked, dismayed and maybe minus an ear lobe or fingertip.’
      • ‘And of course the second thing he does through this travesty is to minimise the Holocaust itself and the crimes of the actual Nazis. and thus to betray the memory of those who died.’
      • ‘Every time it rains, we look up at the sky and are shocked and betrayed.’
      • ‘It is true that for too long I denied the sentiments that lingered in my heart in my reluctance to betray my memory of William.’
      • ‘I felt shocked, angry, betrayed and violated by the article.’
      • ‘To be betrayed by Judas, deserted by all the disciples, and denied by Peter.’
      • ‘It was the saddest day in her life, for it felt like she had finally abandoned her love for Julian, that she had betrayed his memory.’
      • ‘Even as I wondered I felt like I'd betrayed the memory of someone I'd known forever.’
      • ‘But that does not betray my memory of my first husband or my love for him.’
      • ‘So why were they betraying his memory and helping the new family move in?’
      • ‘And by erasing me from your memory and heart, you're betraying your blood.’
      • ‘And if someone is disloyal, if someone betrays a trust, in Texas, they're right down there with child molesters and ax murderers.’
      • ‘Despite her promise to Jack to live her life to the fullest, it still seemed that she would somehow betray his memory if she were to let another man touch her like that.’
      • ‘Because as you say, they feel very, very betrayed.’
      • ‘It is devoid of humble penitence and fails to acknowledge the sins and defects of the Catholic church that betray the reality and memory of Christ.’
      • ‘And to a great extent, I feel somewhat betrayed, if you will.’
      • ‘She simply could not betray Christopher's memory that way.’
      • ‘I wanted him so much but would it betray Adam's memory?’
      • ‘Anyone who votes for them is betraying the memory of all those who fought and died fighting the Nazis.’
      • ‘He had only seconds to look shocked and betrayed before everyone in the inn's common room jumped on them.’
      • ‘Just like Germany and Italy in the inter-war period, China feels betrayed and humiliated, and seeks to avenge historic wounds.’
      • ‘Beat your child; and the worst part of the hurt are the feelings of love betrayed, or trust shocked.’
      • ‘‘I don't feel abandoned or betrayed or even particularly left,’ she wrote me.’
      • ‘As she said, ‘I felt shocked, angry, betrayed and violated’.’
      • ‘He said the ANC's practical actions should convey the message that it would not betray the memory of those who made sacrifices for the cause of liberation.’
      • ‘By your historically unprecedented disloyalty, you have betrayed our trust.’
      • ‘She felt like she was cheating on Andy, like she was betraying his memory.’
      • ‘He stood shocked, unable to think of words, only feeling betrayed.’
      inform against, inform on
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  • 2Unintentionally reveal; be evidence of.

    ‘she drew a deep breath that betrayed her indignation’
    • ‘That this result has been a shock betrays the chasm between the top two divisions.’
    • ‘I queried, the look of puzzlement on my face betraying the fact that I hadn't a clue what he was talking about.’
    • ‘It does seem that The Times sometimes betrays what is likely the more liberal leanings of a lot of its staff.’
    • ‘This betrays, I think, a stunning ignorance of history.’
    • ‘Only the subtle movement of one huge furry ear betrayed his interest in the exchange.’
    • ‘‘Tell me we're not going where I think we're going,’ Dead-Eye asked, his voice betraying only mild interest.’
    • ‘Michael's hand fell, his face betrayed the shock he felt.’
    • ‘Katherine's face betrayed utter shock, then utter amusement.’
    • ‘And the carefree indifference to the truth that that sort of statement betrays is worrisome in the extreme - even if it's said in the service of a goal you think we should pursue.’
    • ‘The fact that the New York Post article was written as it was betrays the fact that the Administration feels very vulnerable about this whole issue.’
    • ‘Yet if the 25-year-old's words spoke of surprise, they should not have done; his voice betrayed modesty, not shock.’
    • ‘That's why I say it's an absurd question, because it betrays, at the very least, a serious oversimplification of evolutionary genetics.’
    • ‘Chantal's response forced his eyes to betray his shock as well.’
    • ‘Jake's dark eyes betrayed that he was in a state of worried shock in itself, but it seemed to vanish when Vivian's blessed lips spread into a infinitely joyful smile.’
    • ‘Herod's face betrayed his shock and anger as he scooted his large body off his throne.’
    • ‘Just a slight tensing of the muscles, an infinitesimal straightening of the back, a tiny lift of the head, betrayed his sudden interest.’
    • ‘If it wasn't, their repeated refusal to even investigate gross abuses betrays a lack of interest in truth or accuracy that calls into question our ability to believe anything written in the paper.’
    • ‘Neyl wriggled out of the window and held on tightly with both hands, his face betraying his shock.’
    • ‘Her face betrayed her shock and betrayal, her eyes filled with tears.’
    • ‘Her pale face betrayed the greatness of the shock she had just been through.’
    manifest, make manifest, exhibit, reveal, convey, communicate, make known
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Origin

Middle English: from be- ‘thoroughly’ + obsolete tray ‘betray’, from Old French trair, based on Latin tradere ‘hand over’.

Pronunciation

betray

/bəˈtrā//bəˈtreɪ/