Denshi Jisho — Online Japanese dictionary

偉い えらい 1: great; excellent; admirable; remarkable; distinguished; important; celebrated; famous; eminent;
2: (Usually written using kana alone) awful; terrible
Common word, Adjective 
偉い目 えらいめ terrible time; hard time; bad day
Expression 
偉い人 えらいひと celebrated personage; big-wig; person in a high position
Noun 
偉いさん えらいさん big shot; higher-ups
Noun, Colloquialism 
偉いですね えらいですね good!; great!
Expression, Usually written using kana alone 

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