lock - definition and synonyms


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  1. 1
    [countable] a part of a door, drawer, suitcase etc used for fastening it so that no one can open it. You usually open and close locks with a key, but if you pick a lock, you use something else to open it, often illegally

    He slowly turned the key in the lock.

    All the windows were fitted with locks.

    1. a.
      a piece of equipment used for preventing someone from using a vehicle, machine etc

      Use a steering-wheel lock for your car.

  2. 2
    [countable] a place on a river or canal with a set of gates which open and close to allow boats in. The water can then be moved to a lower or higher level.
  3. 3
    [countable] a way of holding someone so that they cannot move when you are fighting
  4. 4
    [countable] computing something that prevents information on a computer from being changed or looked at by someone who does not have permission
  5. 5
    [countable] in rugby, a player in the second row of the scrum
  6. 6
    [countable/uncountable] British a steering wheel on full lock is turned as far as possible

    Even on full lock I couldn’t get round the corner.

  7. 8
    politics British a policy to protect something or prevent it from being changed

    Under the triple lock pensions guarantee, pensions will rise every year in line with earnings, prices or 2.5%, whichever is higher.

  8.   From our crowdsourced Open Dictionary
    used in politics to refer to a policy that will protect something or prevent it from being changed

    The PM pledged to keep the "triple lock" system, which ensures the state pension goes up by whichever is higher - inflation, wages or 2.5%.

    David Cameron is to unveil a five-year "tax lock" as he pledges people will always be able to keep more of their money under the Tories.

    Submitted from United Kingdom on 29/04/2015