Borrowed from Medieval Latin dictionarium, from Latin dictionarius, from dictio (“speaking”), from dictus, perfect past participle of dīcō (“speak”) + -arium (“room, place”).
dictionary (plural dictionaries)
- A reference work with a list of words from one or more languages, normally ordered alphabetically, explaining each word's meaning, and sometimes containing information on its etymology, pronunciation, usage, translations, and other data.
- (by extension) Any work that has a list of material organized alphabetically; e.g., biographical dictionary, encyclopedic dictionary.
- (computing) An associative array, a data structure where each value is referenced by a particular key, analogous to words and definitions in a physical dictionary.
dictionary (third-person singular simple present dictionaries, present participle dictionarying, simple past and past participle dictionaried)
- (transitive) To look up in a dictionary.
- (transitive) To add to a dictionary.
- (intransitive, rare) To compile a dictionary.
- (intransitive) To appear in a dictionary.