Children's, Intermediate and Advanced Online English Dictionary & Thesaurus

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part of speech: prefix
definition 1: a prefix that means "before."
"Pre-" means "before" in the word "premature." A premature baby is a baby that is born before he or she is fully developed.
definition 2: a prefix that means "in front of."
"Pre-" means "in front of" in the word "prefix." A prefix is something that goes in front of another word or word root to make a new word with a changed meaning.