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OALD URLﾘﾝｸ(oald8.oxfordlearnersdictionaries.com)
COBUILD URLﾘﾝｸ(dictionary.reverso.net)
MWALD URLﾘﾝｸ(www.learnersdictionary.com)
LDOCE URLﾘﾝｸ(www.ldoceonline.com)
Cambridge URLﾘﾝｸ(dictionary.cambridge.org)
Chambers URLﾘﾝｸ(www.chambersharrap.co.uk)
Macmillan URLﾘﾝｸ(www.macmillandictionary.com)
Collins URLﾘﾝｸ(www.collinsdictionary.com)
(*1) MW URLﾘﾝｸ(www.merriam-webster.com)
AH URLﾘﾝｸ(education.yahoo.com)
ODE/NOAD URLﾘﾝｸ(oxforddictionaries.com)
Newbury House URLﾘﾝｸ(nhd.heinle.com)
(*2) Random House URLﾘﾝｸ(dictionary.reference.com)
Webster's 1828 Dictionary他多数 URLﾘﾝｸ(www.onelook.com)
(*3) AH, Collins, Random House URLﾘﾝｸ(www.thefreedictionary.com)
(*1), (*2), (*3) → iOS, Android版の無料アプリあり
(*2) → オリジナルのRandom Houseから新語, 例文を大幅増強