Meaning of SUBJUNCTIVE in English

adj. & n. Gram.

adj. (of a mood) denoting what is imagined or wished or possible (e.g. if I were you, God help you, be that as it may).

n. 1 the subjunctive mood. 2 a verb in this mood. subjunctively adv.

[ F subjonctif -ive or LL subjunctivus f. L (as SUBJOIN), transl. Gk hupotaktikos, as being used in subjoined clauses ]

Concise Oxford English dictionary.      Краткий оксфордский словарь английского языка.