lock - definition in the American English Dictionary - Cambridge Dictionaries Online

Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

English definition of “lock”

See all translations

lock

noun [C]  us   /lɑk/

lock noun [C] (DEVICE TO FASTEN)

a device that keeps something, such as a door or drawer, fastened, usually needing a key to open it

lock noun [C] (WATER)

a length of water with gates at either end where the level of water can be changed to allow boats to move between parts of a canal or river that are at different heights

lock noun [C] (HAIR)

a curl of hair, or a group of hairs

lock

verb [I/T]  us   /lɑk/

lock verb [I/T] (NOT ALLOW CHANGE)

to be or hold something in a position or condition where movement, escape, or change is not possible: [T] They’re locked in a lawsuit with their former employer. [I] The cars crashed and the bumpers locked, making it impossible to move. [M] The bank won’t lock in our mortgage rate.

lock verb [I/T] (FASTEN)

If you lock something somewhere, you make it safe by putting it in a special place and fastening it closed with a lock: [T] He locked the documents in his filing cabinet.
(Definition of lock from the Cambridge Academic Content Dictionary © Cambridge University Press)
What is the pronunciation of lock?
Add Cambridge dictionaries to your browser to your website

Definitions of “lock” in other dictionaries

Word of the Day

Morse code

a system used for sending messages, in which letters and numbers are represented by short and long marks, sounds, or flashes of light

Word of the Day

The language of elections

by Liz Walter,
April 22, 2015
On May 7th, citizens of the UK will be going to the polls (having an election) to decide who will form the next government. This kind of election is known as a general election. The country is divided into 650 areas, called constituencies. Each constituency elects a member of parliament (MP) to

Read More 

e-juice noun

April 27, 2015
the liquid content in an e-cigarette, which includes nicotine and may be flavoured in various ways Cannabidiol oil that comes from industrial hemp plants, which is what is infused into our e-juice, is 100 per cent legal.

Read More