Definition of treasonable in US English:



  • (of an offense or offender) punishable as treason or as committing treason.

    ‘there was no evidence of treasonable activity’
    • ‘You shall be punished for this treasonable work.’
    • ‘Mobutu shirts and leopard-print hats are worn openly, a practically treasonable offence only six months ago.’
    • ‘The church was further bolstered in 1563 when another Act of Uniformity made refusal to take the oath, or the defence of papal authority, a treasonable offence.’
    • ‘All of us who have shared the triumphs of Grand Slams and Five Nations' championships had harboured deep inside ourselves the possibly treasonable thought that perhaps we might never exult again.’
    • ‘To be given privileged access to her and to betray it is an almost treasonable crime.’
    • ‘He had access to top-secret Allied intelligence intercepts of German radio traffic which - in a treasonable breach of security - he passed direct to the Soviet High Command.’
    • ‘To announce that there must be no criticism of the President, or that we are to stand by the President, right or wrong, is not only unpatriotic and servile, but is morally treasonable to the American public.’
    • ‘With Maguire the treasonable act of rebellion itself was less in dispute than the questions how, where and before whom it could be tried.’
    • ‘The 1807 trial, presided over by Chief Justice John Marshall in the U.S. Circuit Court in Richmond, Virginia, ended with Burr's acquittal on the grounds that he had not committed overt treasonable acts.’
    • ‘In committing himself to this policy he risked accusations of treasonable relations with the enemy, and so risked his life.’
    • ‘The Senate considered this to be a treasonable offence but there was little they could do.’
    • ‘He was also accused of having supported the Levellers' Agreement of the People and of preaching ‘most seditious and treasonable speeches against the monarchy itself.’’
    • ‘She liked to boast that one of her ancestors was private secretary to the Earl of Antrim during His Lordship's treasonable association with Bonnie Prince Charlie.’
    • ‘But to come back to Tacitus for a second - he shows the other side, the treasonable side of the clerks of the Roman Empire.’
    • ‘The main character, Maurice Castle, defects to Moscow and, although this fictional character is vastly different from Philby, I have no doubt that Greene had in mind the treasonable activity of Philby when creating Castle.’
    • ‘The 1614 Synod was significant for another reason in that it upheld the view by then traditional in Catholic theology, that treasonable activity against the state was inadmissible for Catholics.’
    • ‘And as for the crime of holding treasonable correspondence with those lying overseas, they should never have taken it off the statute book.’
    • ‘The long title is ‘An act for the safety and preservation of his Majesty's person and government against treasonable and seditious practices and attempts’.’
    • ‘On the Allied side it became a synonym for treasonable or hostile activity, so that to call people collaborators was to express strong disapproval for their actions.’
    • ‘Fortunately, Florida land speculation is no longer considered a treasonable offense.’
    traitorous, treacherous, perfidious, treasonous, disloyal, faithless, duplicitous
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