Englishfor English speakers
operation
Noun
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An operation is a medical process, often opening the human body.
The doctors performed the operation in three hours.
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An operation is an action of a group of people working for a goal (often military).
The Army operation was a success.
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An operation is part or all of a business. small(often plural)/small
The company's East Coast operation was bigger than its West Coast operation.
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An operation is a symbol that is used to perform a specific operation (addition, subtraction, multiplication or division) in maths.
The plus symbol is used to perform a specific operation in maths which is addition.
conditions
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noun
the set of circumstances that affect someone's welfare
hazardous working conditions
harsh living conditions
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noun
the prevailing context that influences the performance or the outcome of a process
there were wide variations in the conditions of observation
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noun
(= weather, weather condition, atmospheric condition)
the atmospheric conditions that comprise the state of the atmosphere in terms of temperature and wind and clouds and precipitation
they were hoping for good weather
every day we have weather conditions and yesterday was no exception
the conditions were too rainy for playing in the snow