OS X Mountain Lion: Get a quick Dictionary definition
Dictionary gives you a quick definition of a word in the Spotlight search field, and in most documents and webpages.
In the Spotlight search field
Click the Spotlight icon (looks like a magnifying glass) in the upper-right corner of your screen, and type a word. The search results include the Dictionary definition.
To view the definition, highlight it or press Command (⌘)-L. To open the definition in the Dictionary app, press Command (⌘)-D.
In a document or webpage
Do one of the following:
- Control-click a word, or tap it using two fingers, and then chose “Look Up in Dictionary” from the shortcut menu.
- Tap a word using three fingers.
- Select a word and press Command (⌘)-Control-D.
- In Pages, Keynote, and Numbers, Control-click a word and choose Writing Tools > “Look Up in Dictionary and Thesaurus” from the shortcut menu.