Examples of “lock” in a Sentence

noun A device that fastens something shut, opened only with a key, code, or similar means.

• She changed the lock on the front door after losing her keys.
• The lock on the old garden gate is so rusty that the key barely turns.
• Every locker at the swimming pool has a small lock that takes a coin.

verb To fasten something with a lock, or to become fixed in place.

• Remember to lock the car before you leave.
• The wheels locked up when he slammed on the brakes.
• Please lock the back door when you go up to bed.

noun A section of a canal enclosed by gates, used to raise or lower boats between different water levels.

• The narrowboat waited its turn to pass through the lock.
• We helped the lock keeper open the gates so the boat could drop down.
• It takes about ten minutes for a lock to fill with water.

noun A strand or tuft of hair.

• A lock of hair fell across her face.
• She kept a lock of her baby's hair in a small envelope.
• He brushed a stray lock of gray hair from his forehead.