More Than Just Korean-English Dictionaries
These two free online Korean dictionaries are incredibly useful for Korean learners as well as Korean speakers learning English.
More than just dictionaries, these websites collectively offer example sentences, phrases, idioms, famous sayings and daily topics.
Naver
The Naver Korean-English online dictionary gives you loads of example sentences for any word you look up. It also provides an idiom and phrase dictionary.
Daum
The Daum Korean-English online dictionary offers example sentences along with the definitions. They also have famous sayings and new daily topics.
The Daum dictionary is also available for Korean-Chinese and Korean-Japanese!