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first

 
 
/ˈfɜːst/ adjective

Definition

BEFORE coming before all others: Who was the first person to arrive at the party? He was nervous on his first day at school. Her first novel didn't sell very well. They went abroad last year for the first time since having children.
NUMBER 1st written as a word
IMPORTANT most important: Sheila won first prize in the photo competition. → See also in the first place
(Definition of first adjective from the Cambridge Learner's Dictionary © Cambridge University Press)

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