iOS: How To Find A Word Definition In iOS Dictionary

ios_lookup_word.m

/* iOS 5 has a new framework to look for a word definition and present the definition.
 *
 * UIReferenceLibraryViewController is a subclas of UIViewController, so you can push 
 * or present it as modal view controller to see the definition.
 */

NSString *term = @"Reference";

if ([UIReferenceLibraryViewController dictionaryHasDefinitionForTerm:term]) {
        NSLog(@"Term: %@, has definition", term);
        UIReferenceLibraryViewController *refVC = 
                [[UIReferenceLibraryViewController alloc] initWithTerm:term];
        [self presentModalViewController:refVC animated:YES];
}