lock (A2)

noun

Pronunciation: /lɒk/

Definition

A device that keeps something shut or fastened, which can only be opened with a key or code.

Examples

• The thief tried to pick the lock on the back door.

• Make sure to turn the lock when you leave the house.

• This suitcase has a combination lock to keep your belongings safe.

How to Use lock

lock up (phrasal verb)

To secure a building or place with locks. — "The shopkeeper locks up at 6 PM."

lock in (phrasal verb)

To trap or confine someone or something. — "The prisoners were locked in their cells."

lock out (phrasal verb)

To prevent someone from entering a place by locking the doors. — "He was locked out of his apartment."

lock down (phrasal verb)

To put a place under strict security control. — "The school was put on lockdown after a threat."

Synonyms of lock

Words with a similar meaning to lock:

• latch
• bolt
• fastener

Antonyms of lock

Words with the opposite meaning to lock:

• key
• unlock
• opening

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