[ 'sʌb(ə)lt(ə)n ]
■ noun an officer in the British army below the rank of captain, especially a second lieutenant.
■ adjective
1》 of lower status.
2》 Logic, dated (of a proposition) implied by another proposition but not implying it in return.
Origin
C16 (as adjective): from late L. ~us , from L. sub- 'next below' + alternus 'every other'.