名詞 elective:

1. a course that the student can select from among alternatives
   同義詞：elective course

形容詞 elective:

1. subject to popular election
   同義詞：elected
2. not compulsory

1. She is taking French as an elective next year.
   她明年選修法語。

e.lec.tive

adj.（形容詞）
Of or relating to a selection by vote.
關(guān)于投票選舉的
Filled or obtained by election:
由選舉產(chǎn)生的或獲得的：
例句：
elective office.
由選舉產(chǎn)生的職位

Having the power or authority to elect; electoral.
有選舉權(quán)的；選舉人的
Permitting or involving a choice; optional:
隨意的：允許或涉及選擇的；隨意的：
例句：
elective surgery.
非急需施行的手術(shù)

n.（名詞）
An optional academic course or subject.
選修的科目：選修課程或課題

【引伸】
elec.tively
adv.（副詞）
elec.tiveness
n.（名詞）