Englishfor English speakers
variable
Noun
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A variable is something that may not always be the same.
In life insurance, sex is an important variable because men generally die younger than women.
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A variable is something used in mathematics for an unknown value.
In "x = 1 + 2 +...n = ((1 + n) × n)÷2", x is the variable.
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A variable is something used in computer programming languages that stores data, such as a number or words.
variable
Adjective
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If something is variable, it changes often.
The temperature in the area is highly variable.
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If a group is variable, there are big differences between things in the group.
The expected height of children in 3rd grade is variable.
focus
Verb
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If you focus on something, you pay special attention to it.
A small company will probably focus its attention on each artist's project more than a major label.
Class, please focus on your assignment and stop talking.
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If you focus a lens, you adjust it to make a clear picture.
Most digital cameras automatically focus on the object in the centre.
You know, without my glasses, my eyes just can't focus well enough to read.
focus
Noun
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The focus is the main thing or person that people are paying attention to.
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If your focus is on something, your attention is on it.
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If something is in focus, the image is clear.