dictionary

IPA: dˈɪkʃʌnɛri

A reference work with a list of words from one or more languages, normally ordered alphabetically, explaining each word's meanings (senses), and sometimes also containing information on its etymology, pronunciation, usage, semantic relations, and translations, as well as other data.
(preceded by the) A synchronic dictionary of a standardised language held to only contain words that are properly part of the language.
(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 dictionary (sense 1).
Nickname for a swot or studious person, or one who uses needlessly complicated words.

Examples of "dictionary" in Sentences

I always keep a pocket-sized dictionary with me so I can quickly look up any unfamiliar words
The new student used their English-Spanish dictionary to help them understand the homework assignment
My grandmother gifted me a vintage dictionary that had belonged to my great-grandfather
The online dictionary has a feature where you can listen to the pronunciation of each word
The dictionary on my phone has a search function that makes it easy to find definitions on the go