Englishfor English speakers
constant
Adjective
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If something is constant, it doesn't change over time.
I have this constant pain in my back. I wish it would stop.
The rain has been constant all morning.
constant
Noun
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A constant is a value that doesn't change.
In the formula math7x^2+3y+5=z/math, 5 is a constant.
closed
Adjective
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Not open.
The store is closed on the weekends.
—
Not available to the public.
I used a closed source to write the article.
circuit
Noun
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A circuit is a loop that normally starts and finishes in the same place.
They ran a circuit around the park.
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A circuit is a closed route where electricity flows.
The electric circuit can hold 20 amperes.