Englishfor English speakers
variance
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noun
the second moment around the mean; the expected value of the square of the deviations of a random variable from its mean value
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noun
an official dispensation to act contrary to a rule or regulation (typically a building regulation)
a zoning variance
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noun
(= variation)
an activity that varies from a norm or standard
any variation in his routine was immediately reported
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noun
(= division)
discord that splits a group
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noun
(= discrepancy)
an event that departs from expectations
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noun
(= variability)
the quality of being subject to variation
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noun
(= divergence)
a difference between conflicting facts or claims or opinions
a growing divergence of opinion
function
Noun
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Something or someone's function is its purpose or its job.
The army sometimes performs a policing function.
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A function is an organised event.
I met Sylvia at a church function last week.
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If mathX/math is a function of mathY/math, then mathX/math exists because of or is affected by mathY/math
The speed of the computer is a function of its main processor.
When you see, mathY=f(X)/math, you read it, "mathY/math is a function of mathX/math". Here the value of mathY/math depends on the value assigned to the variable mathX/math.
function
Verb
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If something is functioning, it is working and is not completely broken.
Her heart stopped, but her brain continued to function.
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If something functions as mathX/math, it does the job of mathX/math.
In this sentence, "sentence" functions as the subject.