a mechanism for keeping a door, lid, etc., fastened, typically operated only by a key of a particular form., a person's hair., a length or curl of hair.

lock of hair, have someone/something under lock and key, lock horns (with someone)

Formal and Informal Expressions of locks

In different contexts, you can replace 'locks' with suitable alternatives. In a more formal setting, 'fastener' is apt. In informal speech or writing, 'hair' is a commonplace synonym.

locks: Explore its Definition & Usage

locks Definition

1a mechanism for keeping a door, lid, etc., fastened, typically operated only by a key of a particular form.
2a person's hair.
3a length or curl of hair.

Using locks: Examples

Take a moment to familiarize yourself with how "locks" can be used in various situations through the following examples!

Example
I need to change the locks on my front door.
Example
She has beautiful long locks.
Example
He has curly locks that bounce when he walks.
Example
The lock on the suitcase was broken, and it wouldn't stay closed.
Example
She turned the key in the lock and opened the door.

locks Synonyms and Antonyms

Synonyms for locks

Phrases with locks

lock of hair
a small bunch of hair
Example
She gave him a lock of her hair as a keepsake.
have someone/something under lock and key
to keep someone or something securely locked up or guarded
Example
The valuable documents were kept under lock and key in a safe.
lock horns (with someone)
to become involved in a dispute or argument with someone
Example
The two politicians locked horns over the issue of healthcare reform.

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Summary: locks in Brief

The term 'locks' [lɒks] refers to a mechanism for keeping a door or lid fastened, operated by a key, or a person's hair. It can also refer to a length or curl of hair. Examples include 'I need to change the locks on my front door,' and 'She has beautiful long locks.' Phrases include 'lock of hair,' and 'have someone/something under lock and key.'