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operation noun

  /ˌɑ.pəˈɹeɪ.ʃən/ , /ˌɒp.əˈɹeɪ.ʃən/
  • (medicine) A surgical procedure.
 オペレーション, オペ, 手術
  • (military) A military campaign (e.g. Operation Desert Storm)
 作戦
  • The method by which a device performs its function.
 作業, 操作
  • (computing, logic, mathematics) A procedure for generating a value from one or more other values (the operands);(mathematics, more formally) a function which maps zero or more (but typically two) operands to a single output value.
 演算

opera noun

  /ˈɑ.pɚ.ə/ , /ˈɑ.pɹə/ , /ˈɒp.ə.ɹə/ , /ˈɒp.ɹə/ , /ˈɔp.ə.ɹə/ , /ˈɔp.ɹə/
  • (music) A theatrical work, combining drama, music, song and sometimes dance.
 オペラ, 歌劇
  • A company dedicated to performing such works.
 歌劇団, オペラ
  • (music) The score for such a work.
 オペラ

operator noun

  /ˈɑpəˌɹeɪtɚ/ , /ˈɒpəˌɹeɪtə/
  • One who operates.
 オペレーター, 演算子, 作用素, 操作者
  • A member of a military special operations unit.
 演算子, 交換手, 作用素
  • A telecommunications facilitator whose job is to establish temporary network connections.
 交換手

operate verb

  /ˈɑpəɹeɪt/ , /ˈɒpəɹeɪt/
  • (transitive, or, intransitive) To perform a work or labour; to exert power or strength, physical or mechanical; to act.
  • (medicine, transitive, or, intransitive) To perform some manual act upon a human body in a methodical manner, and usually with instruments, with a view to restore soundness or health, as in amputation, lithotomy, etc.
 操作
運営する

operational adjective

  • Of or relating to operations, especially military operations.
 オペ
binary operation
二項演算
unary operation
単項演算
special military operation
特別軍事作戦
in operation
作動中
arithmetic operation
算術演算
set operation
集合演算
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