Dictionary User Guide
for macOS Sequoia
With Dictionary on your Mac, you can easily get definitions of words and phrases from a variety of sources.
Tip: You can also quickly on your Mac, type a word or phrase in the search field in the upper-right corner of the Dictionary window.
Note: If you add another Dictionary source, wait for it to download completely before searching for a word or phrase. For information about adding sources, see “Customize Dictionary sources” below.
While reading the definition, you can see links (blue text) to related words. In addition, you can hold the pointer over any word or phrase and click to look up its definition.
When you look up a word in a definition, a SnapBack button 
on your Mac, click the font size buttons Get more help for your Mac