Definition of Prefix

a partial word or number affixed to the beginning of a word or number to either complete the word or alter the meaning

Examples of Prefix in a sentence

Often the prefix “un” is used to transform a word into its opposite meaning, like well and unwell.  🔊

Attaching the prefix “anti” to the beginning of a word conveys strong opposition to the subject.  🔊

You can change the meaning of almost every word to its opposite by adding the prefix “un”; attractive/unattractive, happy/unhappy.  🔊

In order to make an international phone call, first you must know the country or area code, and then the prefix or three numbers immediately after.  🔊

“Pro” and “anti” are commonly used in political debates as a prefix to state a position for or against a specific subject.  🔊

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