Definition of lens cap in English:

lens cap

noun

  • A protective cover for a camera lens.

    ‘he had forgotten to remove the lens cap’
    • ‘Just before you replace the batteries, put the lens cap back on.’
    • ‘I bet they would've turned out better if I'd had the lens cap off.’
    • ‘It comes complete with lithium battery, battery charger, lens cap, and shoulder strap, but you'll need to invest in a carry case to protect your investment.’
    • ‘They printed photos of the defence minister trying to watch military manoeuvres through binoculars with the lens caps still on.’
    • ‘It is advisable to not have the lens cap attached to the camera with a string.’