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This online dictionary provides the usual range of tools: definitions, audio files for pronunciation, etc. Its example sentences are provided by the Goethe Institute and can be very helpful for determining the finer meanings of a given term.
Linguee searches the Internet for terms and seeks out reliable sources for real-text bilingual examples (i.e., university, medical, and international business websites). This website can be another helpful tool for determining appropriate usage of an unfamiliar or new term.