Englishfor English speakers
thumb
Noun
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A thumb is the part of your hand that looks like a short, fat finger. Most people have a thumb on each hand.
In many countries, pointing your thumb up means, "good".
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A thumb or thumbnail is a small picture on a computer that you can click on to see a larger picture.
thumb
Verb
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When someone thumbs, they are standing by a road waiting for someone to give them a ride.
I thumbed down a pickup truck to take me to San Antonio.
bolt
Noun
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A kind of thick screw that is used with a nut and sometimes a washer.
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A a short heavy arrow used by a crossbow.
bolt
Verb
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If you bolt you run away suddenly.