Definition of vigilant in English:



  • Keeping careful watch for possible danger or difficulties.

    ‘the burglar was spotted by vigilant neighbours’
    • ‘We must keep alert and vigilant to the future plans of the developers.’
    • ‘For unless you are vigilant and eagle eyed, you may not spot a fake note at the right time.’
    • ‘Dog owners should be extremely vigilant and wary of anyone showing an unusual interest in their pet.’
    • ‘Yes I do agree that parents should be vigilant in what they let their children watch.’
    • ‘Once again, we appeal to the community to be vigilant and to keep a watchful eye out for the elderly.’
    • ‘We were warned to be vigilant and wary of those who continue to seek dominance over others.’
    • ‘As a community we need to be on our guard, and remain vigilant to try to combat this problem.’
    • ‘We were warned to be vigilant and alert to what the road users around us were doing.’
    • ‘London remains on a high state of alert and everyone needs to be vigilant, said Sir John.’
    • ‘Meanwhile, we can all play our part by remaining vigilant and reporting suspicious behaviour.’
    • ‘As women we need to remain vigilant and watch how our South African Constitution is put into practice.’
    • ‘He also urged individuals to be vigilant in watching for offenders and to report them to their local councillor.’
    • ‘We have to remain ever vigilant and issue extra advice to their offices on the possible risk of an anthrax attack.’
    • ‘Also we ask all parishioners to be vigilant and keep a watchful eye on this amenity.’
    • ‘Of course you should be vigilant with your finances and budget carefully but hoarding money is not the answer.’
    • ‘I would appeal to people to be vigilant and report any suspicious behaviour near farms.’
    • ‘We are also urged to be vigilant for suspicious behaviour, vehicles and packages.’
    • ‘In other words, unions and their members need to continue to be wary and vigilant.’
    • ‘Continue to go about your day-to-day business in the normal way, but remain alert and vigilant.’
    • ‘So the entrepreneur is always vigilant for ways of improving product performance and reducing costs.’
    watchful, on the lookout, observant, sharp-eyed, keen-eyed, gimlet-eyed, eagle-eyed, hawk-eyed, with eyes like a hawk, with one's eyes open, keeping one's eyes peeled, keeping one's eyes skinned, attentive, paying attention, alert, on the alert, on one's toes, on the qui vive
    awake, wide awake, unsleeping, on one's guard, on guard, concentrating, careful, cautious, wary, chary, circumspect, prudent, heedful, mindful
    prepared, ready
    beady-eyed, not missing a trick, on the ball, keeping a weather eye on things, leery
    regardful, argus-eyed
    View synonyms


Late 15th century: from Latin vigilant- keeping awake, from the verb vigilare, from vigil (see vigil).