Englishfor English speakers
source
Verb
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If you source something, then you obtain or receive it.
source
Noun
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The source of some material, an idea, a product, etc. is the place it came from originally.
XYZ company can't supply these parts anymore, so we need to find a new source.
Church sources said four people were injured and 100 to 200 were taken away by the police.
The paper comes primarily from British sources.
is the main source of global warming.
key
Noun
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A key is a small instrument, usually metal used to open locks.
I put my key in the lock and turned it.
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A key is a button used for typing.
Type your name and hit the ENTER key.
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A key is the part of a keyboard instrument you press with your fingers to play a sound.
The piano has a pattern of black and white keys.
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The key in music is the tonal centre of a piece of music.
Mozart's Symphony No.40 is written in the key of G minor.
key
Adjective
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Something that is key, is an important or a main thing.
Accuracy is a key part of playing music.
key
Verb
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To key is to lock something with key, or like using a key.
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To key is to put locks on a building.
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The locksmith was called in to key the building for better security.
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To key is to enter information into a computer.
He keyed in all the data from the survey.