One who interprets or explains. Formerly a frequent title of books explaining the meaning of technical terms or unusual words. Obsolete.

A work in which the etymologies of words are given or discussed; an etymological dictionary.

a dictionary in which the words are arranged in groups according to the correspondence of their terminal sounds.

A dictionary or glossary of a dialect or minority language, especially one dealing with a small area.

†(a) a bilingual dictionary giving the equivalents of English words in a foreign language (obsolete); (b) a dictionary in which terms or synonyms…

An interpreter; a person who translates orally between people speaking different languages.

North American. Designed for use by college students or at college level; esp. as collegiate dictionary, (a proprietary name in the U.S. for) a…

North American. elliptical for collegiate dictionary at sense A. 2b (proprietary in the U.S.).