American Dictionary

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Definition prefix in American English

prefix noun

[countable] noun
/ˈpriˌfɪks/
1

a group of letters that is added to the beginning of a word to change its meaning. For example, the prefix "un-" is added to the word "important" to form "unimportant."

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2

the first set of numbers in a telephone number

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3

a title such as "Dr." or "Mrs." that is used before someone's name

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Definition prefix in American English