dictionary lookup

Previously known as PopClipBuddy. Quickly lookup media to get metadata and trailers (was PopClipBuddy).

Address Book plug-in uses reverse number lookup in Google.

Comprehensive thesaurus and dictionary.

Dynamic rhyming dictionary.

Bookmark words in Dictionary.app.

Spelling, grammar, dictionary, and more.

Your multilingual dictionary essential for your Mac.

Keep Your Word lets you build your own dictionary.

Simple interface to A Latin Dictionary, by Lewis and Short.

JEDict 4 is multilingual dictionary capable to search any plain text files.