elective

Từ điển WordNet v3.1 - WordNet Dictionary

I - noun

a course that the student can select from among alternatives
• Syn:
elective course
• Hypernyms:
course, course of study, course of instruction, class

II - adjective

1. subject to popular election
- elective official
• Syn:
elected
• Ant:
appointive
• Similar to:
electoral, nonappointive
• Derivationally related forms:
elect
2. not compulsory
- elective surgery
- an elective course of study
• Similar to:
optional
• Derivationally related forms:
elect

• Từ đồng nghĩa / Synonyms:
  elected, elective course
• Từ trái nghĩa / Antonyms:
  appointive, appointed