American Heritage Dictionary of the English Language

The American Heritage Dictionary of the English Language (AHD) is an American dictionary of English published by Boston publisher Houghton Mifflin, the first edition of which appeared in 1969. Its creation was spurred by the controversy over the Webster's Third New International Dictionary.

James Parton, the publisher (and co-owner) of the history magazine American Heritage, was appalled by the permissiveness of Webster's Third, published in 1961, and tried to buy the G. and C. Merriam Company so he could undo the changes. When that failed, he contracted with Houghton to publish a new dictionary. The AHD was edited by William Morris and relied on a usage panel of 105 writers, speakers, and eminent persons chosen for their well-known conservatism in the use of language. However, Morris made inconsistent use of the panels, often ignoring their advice and inserting his own opinions.

The AHD broke ground among dictionaries by using corpus linguistics for compiling word frequencies and other information. It took the innovative step of combining prescriptive information (how language should be used) and descriptive information (how it actually is used). The descriptive information was derived from actual texts.

Citations were based on a million-word, three-line citation database prepared by Brown University linguist Henry Kučera.

For expert consultation on words or constructions whose usage is controversial or problematic, the American Heritage Dictionary relies on the advice of a usage panel. In its current form, the panel comprises nearly 200 prominent members of professions whose work demands sensitivity to language. Present and former members of the usage panel include novelists (Isaac Asimov, Barbara Kingsolver, David Foster Wallace and Eudora Welty), poets (Rita Dove, Galway Kinnell, Mary Oliver and Robert Pinsky), playwrights (Terrence McNally and Marsha Norman), journalists (Liane Hansen and Susan Stamberg), literary critics (Harold Bloom), columnists and commentators (William F. Buckley, Jr. and Robert J. Samuelson), linguists and cognitive scientists (Anne Curzan, Steven Pinker and Calvert Watkins) and humorists (Garrison Keillor, David Sedaris and Alison Bechdel). Pinker, author of the style guide The Sense of Style, is its current chair, as of 2016.^[update]

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