lock

US /lɑːk/
UK /lɑːk/
"lock" picture
1.

a mechanism for keeping a door, lid, or container fastened, typically operated by a key or a combination

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He turned the key in the lock and opened the door.
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Make sure you put a strong lock on the gate.
:
boltcatchclaspfastenerlatch
2.

a section of a canal or river with gates at each end where the water level can be changed to allow boats to go up or down

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The boat slowly entered the canal lock.
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Operating a lock requires careful timing.
3.

a small, separate bunch of hair

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She had a beautiful lock of hair that fell over her forehead.
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He kept a small lock of his daughter's baby hair.
:
tresscurlstrandringlet
1.

fasten (something) with a lock

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Please lock the door when you leave.
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She locked her bicycle to the fence.
:
fastensecureboltbarlatchclose
2.

become or be fixed in one position and unable to move

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The wheels locked on the icy road.
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His jaw locked in anger.
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jamstickseizefastenfix
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lock intolock inlock awaylocked-in syndromelock upcentral lockinglock out