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| start up |
verb |
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1. transitive and intransitive verb begin to operate: to begin to operate, or make something begin to operate
 start the engine up
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2. transitive and intransitive verb open business: to begin something such as a business venture
started up her own accounting practice
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3. intransitive verb begin to make sound: to begin to make a sound, especially a characteristic sound, or begin to speak
First a solitary blackbird started up, and soon the whole forest was alive with birdsong.
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4. intransitive verb rise suddenly: to rise suddenly to a standing or upright position
He started up from his chair at the loud sound and rushed to the window.
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