double-lock

The homeowner double-locks the front door before leaving.

Definition

1. Verb:
   • To lock with two turns or a double mechanism: "double-lock" means to lock a door, container, or similar item by turning the key twice or by using a supplementary lock for extra security.
   • To secure firmly: In a figurative sense, it can mean to make something very secure or certain.

Usage Examples

• Verb:
  • She always double-locks the front door before going to bed. (She turns the key twice or uses an additional lock for safety.)
  • The company double-locked its financial records to prevent any tampering. (They secured the records very firmly, metaphorically.)

Advanced Usage

• "to double-lock a deal": to ensure that an agreement is absolutely binding.

  • They double-locked the contract with multiple signatures and notarization. (They made the contract extra secure.)

• "double-locked" as an adjective: describing something that is secured with a double lock.

  • The double-locked safe was impossible to open without the correct key. (The safe had a double-locking mechanism.)

Variants and Related Words

• Double lock (noun): a lock that requires two keys or two turns to open.

  • The old chest had a double lock for extra protection. (A lock with two mechanisms.)

• Double-locking (adj): referring to a mechanism that locks twice.

  • The double-locking system on the gate was very reliable. (The system used two locking actions.)

Synonyms

• Secure: to make safe or tight.
• Bolt: to fasten with a sliding bar (often used for doors).
• Padlock: to lock with a detachable lock.

Phrasal Verbs

• Double-lock up: to lock something completely and securely.
  • Make sure to double-lock up the house before leaving. (Lock all doors and windows with double security.)

Related Idioms

• Lock, stock, and barrel: entirely; completely (though not directly related, it shares the idea of thoroughness).
  • He double-locked everything, lock, stock, and barrel. (He secured every part thoroughly.)