development
US /dɪˈvel.əp.mənt/
UK /dɪˈvel.əp.mənt/

1.
the process of developing or being developed
:
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The development of new technologies is crucial for economic growth.
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Child development is a complex process.
2.
a new product, idea, or event that is the result of development
:
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The latest development in the case is a new witness.
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The company announced a major new development in renewable energy.