有効

(1) 意図した結果を創出しまたは創出することができ、または顕著な効果を生み出す(producing or capable of producing an intended result or having a striking effect; "an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation"-LewisMumford; "effective teaching methods"; "effective steps toward peace"; "made an effective entrance"; "his complaint proved to be effectual in bringing action"; "an efficacious law")(producing or capable of producing an intended result or having a striking effect)

⇒効果的な法律(producing or capable of producing an intended result or having a striking effect)

(2) 論理、真実、または、持っている強制力に関する基礎がしっかりしている(well grounded in logic or truth or having legal force; "a valid inference"; "a valid argument"; "a valid contract")(well grounded in logic or truth or having legal force)

⇒有効な契約(well grounded in logic or truth or having legal force)

(3) 力または影響を及ぼすさま(exerting force or influence; "the law is effective immediately"; "a warranty good for two years"; "the law is already in effect (or in force)")(exerting force or influence)

⇒その法はすでに有効である（または実行されている）(exerting force or influence)

(4) まだ法的に許容できる(still legally acceptable; "the license is still valid")(still legally acceptable)

⇒ライセンスはまだ有効である(still legally acceptable)

(5) 手段または治療としてよく働く(works well as a means or remedy; "an effective reprimand"; "a lotion that is effective in cases of prickly heat")(works well as a means or remedy)

⇒あせもの事例に効果的であるローション(works well as a means or remedy)

(6) 目的を達成することができる効果的に機能すること(able to accomplish a purpose; functioning effectively; "people who will do nothing unless they get something out of it for themselves are often highly effective persons..."-G.B.Shaw; "effective personnel"; "an efficient secretary"; "the efficient cause of the revolution")(able to accomplish a purpose)(functioning effectively)

⇒革命の動力因(functioning effectively)

(7) 意図して結果を導く力を与える性質に特徴的な(marked by qualities giving the power to produce an intended effect; "written propaganda is less efficacious than the habits and prejudices...of the readers"-Aldous Huxley; "the medicine is efficacious in stopping a cough")(marked by qualities giving the power to produce an intended effect)

⇒その薬は、咳を止めるのに効果的である(marked by qualities giving the power to produce an intended effect)