Englishfor English speakers
movement
Noun
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A movement, is a group of people who are all working for the same idea.
The labour movement protects the rights of the workers.
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A movement is a part in a musical composition such as a sonata or symphony.
The first movement of the "Moonlight" Sonata is very famous.
index
Noun
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An index is an alphabetical (A to Z) list, usually at the back of a book, where you can find the pages in a book that talk about particular things or words.
Look in the index to see where they talk about Chomsky.
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An index shows the level of prices, wages, etc. so you can compare them with those of an earlier date.
On Wall Street, the Dow Jones index closed 10 points up at 2,731.23.
index
Verb
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If you index something, you make an index (guide) for it.
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If you index something to a certain price level, you make it go up or down with that level.