a strongbox.
a rented post-office box equipped with a lock.
Also called lockout box. Television. a closed box, usually fitted with a lock, containing electronic equipment to unscramble cable television pictures for subscribers only: used especially to prevent children from watching programs with explicit sexual content.

Nearby words

  1. lock-jaw,
  2. lock-step,
  3. lock-up,
  4. lockable,
  5. lockage,
  6. lockdown,
  7. locke,
  8. locke, david ross,
  9. locke, john,
  10. lockean

Origin of lockbox

An Americanism dating back to 1870–75; lock1 + box1

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019