dictionary

A book or electronic resource that lists the words of a language (typically in alphabetical order) and gives their meaning, or that gives the equivalent of the words in a different language, usually also giving information about their pronunciation, origin, and usage.

"She looked up the word in the dictionary to confirm its meaning." — Oxford English Corpus

A comprehensive list or collection containing detailed information about a particular topic, often arranged in a systematic way.

"The book serves as a dictionary of modern art terminology."

(in computing) A data structure that stores key-value pairs, where each key is unique and maps to a corresponding value.

"In Python, a dictionary is created using curly braces with key-value pairs separated by colons." — Python Documentation

Also called: associative array, hash map, map

A person regarded as having extensive knowledge or being a source of information on a particular subject.

"My grandfather was a walking dictionary of historical facts."

A characteristic or typical style of expression; a distinctive vocabulary or idiom associated with a person, group, or period.

"The poet's unique dictionary of words created a vivid landscape in the reader's mind."