sub ‧ junc ‧ tive /səbˈdʒʌŋktɪv/ BrE AmE noun [countable]
[ Date: 1500-1600 ; Language: Late Latin ; Origin: subjunctivus , from Latin subjunctus , past participle of subjungere 'to join below, subordinate' ]
a verb form or a set of verb forms in grammar, used in some languages to express doubt, wishes etc. For example, in ‘if I were you’, the verb ‘to be’ is in the subjunctive. ⇨ imperative , indicative
—subjunctive adjective