A revised and expanded edition of the original book, with about twice as many definitions, was published in 1990 as The Deeper Meaning of Liff (UK Edition: ISBN 0-330-31606-0, US Edition: ISBN 0-517-58597-9), though the original remains in print. Some of the new words in Deeper had previously appeared in a Liff piece by Adams, Lloyd and Stephen Fry in The Utterly Utterly Merry Comic Relief Christmas Book (1986). The main differences between the two editions (for either version of the book) are those of American English v. British English spellings, though The Deeper Meaning of Liff contains different definitions for both the word "Glossop" and the titular word "Liff".