Englishfor English speakers
addition
Noun
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The part of arithmetic where numbers are added together.
He learned addition quickly.
An example of addition is math2+2=4/math.
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The act of adding something.
The addition of 5 more topics will make the meeting very long and boring.
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Anything that is added.
He put an addition on the house.
operator
Noun
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An operator is a person who operates something.
Jo is the operator of the tractor.
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An operator is a person who works on making connections for people over the telephone.
The operator was struggling to keep the line connected.