lock

Something used for fastening, which can only be opened with a key or combination.

"Give me the key," said my mother; and though the lock was very stiff, she had turned it and thrown back the lid in a twinkling.

We tiptoed into the house, up the stairs and along the hall into the room where the Professor had been spending so much of his time. 'Twas locked, of course, but the Deacon man got a big bunch of keys out of his pocket and commenced to putter with the lock.

A mutex or other token restricting access to a resource.

[T]he application must first acquire a lock on a file or a portion of a file before reading data and modifying it.

A segment of a canal or other navigable waterway enclosed by gates, used for raising and lowering boats between levels.

Here the canal came to a check, ending abruptly with a large lock.

The firing mechanism.

"I never saw such a gun in my life," replied poor Winkle, looking at the lock, as if that would do any good.

Complete control over a situation.

Even though he had not yet done so, Jack felt he had a lock on the game.

To become fastened in place.

If you put the brakes on too hard, the wheels will lock.

We tiptoed into the house, up the stairs and along the hall into the room where the Professor had been spending so much of his time. 'Twas locked, of course, but the Deacon man got a big bunch of keys out of his pocket and commenced to putter with the lock.

To fasten with a lock.

Remember to lock the door when you leave.

To be capable of becoming fastened in place.

This door locks with a key.

To intertwine or dovetail.

with his hands locked behind his back

We locked arms and stepped out into the night.

To freeze one's body or a part thereof in place.

a pop and lock routine

A tuft or length of hair, wool, etc.

Baſſ. […]Nor is the wide world ignorant of her worth, For the foure windes blow in from euery coaſt Renowned ſutors, and her ſunny locks Hang on her temples like a golden fleece, Which makes her ſeat of Belmont Cholchos-'| ſtrond, And many Iaſons come in queſt of her.

If I consent to burn them, will you promise faithfully neither to send nor receive a letter again, nor a book (for I perceive you have sent him books), nor locks of hair, nor rings, nor playthings?

A small quantity of straw etc.

A quantity of meal, the perquisite of a mill-servant.