Englishfor English speakers
the
Determiner
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Used, instead of a, to reference something specific, already known to exist.
Compare "I read a book." and "I read the book."
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Used with a stress, to show that the word following is special.
Are you the John Smith that I went to school with?
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Used with an adjective that acts like a noun to mean all of the people concerned
The poor are always with us.
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Used with superlatives forms of adjectives and adverbs.
You are the best.
matrix
Noun
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A matrix is the situation or conditions in which something else develops or forms.
Within the diverse school matrix, it is likely that there are major differences.
Students need an understanding of literature within a larger matrix of relationships, influences, and effects.
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A matrix is a grid.
Table 2 presents the correlation matrix among the groups and results.
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A matrix is a set of numbers in rows and columns.
revolution
Noun
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A revolution is a sudden significant change.
The Industrial Revolution began when machines were able to make things quicker and cheaper than people.
In the 1960s, you had the women's revolution, the sexual revolution, and all sorts of change.
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A revolution is a war against the government by the country's own people.
There was a revolution in France in 1789.
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When a wheel turns around once it has made a revolution; going in a circle; turning; revolving.
The hour hand on the clock makes one revolution in twelve hours.