Apple has fine tuned OS X and iOS to the point where seemingly little additions have a great impact. For the Mac, there’s a built-in definition and thesaurus look feature, invoked with a simple right-click.
Select lookup on any word within nearly any Mac app and you get a pop up dictionary definition and thesaurus.
iPhone users have a similar function built-in to iOS but it’s not as formal or useful as the official Dictionary.com app, which also includes a thesaurus. Enter a word and get options to view the dictionary definition, thesaurus information, and even have the word played in audio.
Dictionary comes with over 2-million definitions, antonyms, and synonyms. Most of the Dictionary content doesn’t require an internet connection.
You’ll get word origin and history, example sentences, spelling suggestions, and a cool random word selection feature. Just shake the iPhone to get a surprise word.
Dictionary is free but displays advertising across the bottom to help pay for the freight. But even the ad-free option costs only a few dollars. Every iPhone or iPad should have Dictionary.com installed in a Utilities or Reference folder.