non-commissioned officer
noun🔊/ˌnɒn kəˌmɪʃnd ˈɒfɪsə(r)/
🔊/ˌnɑːn kəˌmɪʃnd ˈɑːfɪsər/
(abbreviation NCO)
a soldier in the army, etc. who has a rank such as sergeant or corporal, but not a high rank 军士