a rank of non-commissioned officer in the army or air force, above corporal and below staff sergeant 军士;(陆军或空军)中士 ■(Brit.)a police officer ranking below an inspector (英)巡佐;警察小队长 ■(US)a police officer ranking below a lieutenant (美)(警察)少尉
派生 sergeancy ( pl. -ies) noun(pl. -ies) 语源
Middle English: from Old French sergent, from Latin servient- 'serving', from the verb servire. Early use was as a general term meaning 'attendant, servant' and 'common soldier'; the term was later applied to specific official roles