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- pronunciation:
- a
p
reI
shn
- features:
- Word Combinations (noun)
| part of speech: |
noun |
| definition 1: |
the act or process of working or running.
This factory has been in operation for many years.- synonyms:
- effect, functioning, performance
- similar words:
- action, use
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| definition 2: |
a process in which a doctor repairs or removes a part of the body.
She had an operation on her lung.
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| related words: |
campaign, order, usage |
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