Definition of sergeant first class in English:

sergeant first class

Syllabification: ser·geant first class

Entry from US English dictionary

noun

A noncommissioned officer in the US Army of a rank above staff sergeant and below master sergeant.

Definition of sergeant first class in:

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Word of the day internecine
Pronunciation: ˌɪntəˈniːsʌɪn
adjective
destructive to both sides in a conflict