under lock and key

idiom
Updated on: 15 Nov 2017

Definition of under lock and key

:in a room, box, etc., that is locked
  • The jewels are kept under lock and key.
  • The prisoner is being kept/held under lock and key.

Word by Word Definitions

under play
  1. : in or into a position below or beneath something

  2. : below or short of some quantity, level, or limit

  3. : in or into a condition of subjection, subordination, or unconsciousness

  1. : below or beneath so as to be overhung, surmounted, covered, protected, or concealed by

  2. : subject to the authority, control, guidance, or instruction of

  3. : receiving or undergoing the action or effect of

  1. : lying or placed below, beneath, or on the ventral side

  2. : facing or protruding downward

  3. : lower in rank or authority : subordinate

lock play
  1. : a tuft, tress, or ringlet of hair

  2. : the hair of the head

  3. : a cohering bunch (as of wool, cotton, or flax) : tuft

  1. : a fastening (as for a door) operated by a key or a combination

  2. : the mechanism for exploding the charge or cartridge of a firearm

  3. : an enclosure (as in a canal) with gates at each end used in raising or lowering boats as they pass from level to level

  1. : to fasten the lock of

  2. : to make fast with or as if with a lock

  3. : to fasten in or out or to make secure or inaccessible by or as if by means of locks

key play
  1. : a usually metal instrument by which the bolt of a lock is turned

  2. : any of various devices having the form or function of such a key

  3. : a means of gaining or preventing entrance, possession, or control

  1. : extremely or crucially important

  1. : to lock or secure with or as if with a key : fasten: such as

  2. : to secure (something, as a pulley on a shaft) by a key

  3. : to finish off (an arch) by inserting a keystone

  1. : a low island or reef

  1. : a kilogram especially of marijuana or heroin


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