Dictionary

Dictionary is an application developed by Apple Inc. as a part of macOS. The application provides definitions and synonyms from various dictionaries, Wikipedia articles and a glossary of Apple-related terms. Dictionary was introduced in OS X 10.4 with the New Oxford American Dictionary and Oxford American Writer's Thesaurus (as well as the Wikipedia and Apple Dictionary sections). 10.5 added Japanese dictionaries, 10.7 added the British Oxford Dictionary of English, and 10.8 added French, German, Spanish and Chinese. History OS X's progenitor, OPENSTEP (and NEXTSTEP) provided similar functionality, called Digital Webster, providing dictionary and thesaurus definitions from Webster's Ninth New Collegiate Dictionary and Webster's Collegiate Thesaurus (termed the "First Digital Edition"). OPENSTEP Services provide lookup from all applications.